You seem pretty angry and like your 12 years old with the jealousy thing. Try not to be so bothered by everything she does, Just go to the party with the mindset of 'I'm gonna make this party the greatest party of all time' and she will wish she was apart of it.

In fact here's an order: YOU Sylar Jones are going to make everyone's night at that party the best night they've ever had!

Get pumped, the rest is up to you..

In regards to your texting, it's too boring she probably has that kind of conversation with every other person. Be fun, be Sexual, make her love talking to you. Don't always be serious. and you don't need to answer everything she asks. React less.

e.g.

Her: I am going to the hospital
You: Scratch that come over to my place, I know C.P.R

Her: Blood test, I'm officially screwed.
You: Not yet
or
You: If it all goes well I MIGHT help you out with the second part of your text, if your good.

Yes it bold but you regret the things you don't do
I don't know if that's what you meant by "Did I handle it well" but I thought I'd add it anyway

Too much information here. Even if you wanted her to know it was work you were busy with, the "its not an easy job" part was unnecessary. You're a man, a man who takes on challenging tasks with a smile. You're given big projects at work because they trust you to handle them. (this is the impression you want her to have).
This is something you should be demonstrating. You weren't doing too badly with that text exchange until you qualified yourself to her.

From reading this whole post it's obvious you're very emotionally invested in this girl. I would agree with previous posters and say pull out asap, she's not worth your time and she'll just cause you a lot of grief in the end.

My life took a U turn

She was pretty sick the whole week of my birthday and was in another city. She kept messaging that she'll miss the party and would be jealous that I would be dancing with other girls.

A day before my birthday party, I decided to surprise her, I traveled for 3 hours and ended up in her room. She was surprised to the core. I postponed my birthday party.

I spent the next 2-3 days with her and her family. Her mom made special food for me, her dad made drinks for me, she was holding my hands/arms. When I was away for a while, she kept messaging me saying "i miss you".

I did not become needy and did not do anything stupid. I acted like an Alpha and made sure I took care of her when she was sick and wanted someone by her side.

Finally, I ended celebrating my birthday with her family, we went out for a small road trip. Her family likes me. She said "I'm charming"

As we are close friends, I'm trying to help her out with her job. Whenever we are together, she holds my hands, we kissed (no smooching yet) a couple of times.

Here's what I learnt:

Do not become needy, she has to feel like you are a trophy and make her work for you.

Be caring, try to understand what she wants from you, your relationship.

Make sure you impress her friends/family.

And you should be able to close.

All above mentioned is very very needy.Dont you have anything to do yourself?

You told her you're busy with work, and have a lot on your plate. Yet spend 3 days with her in hospital. You'd have shown 100x more value had you had a good time at your party and hooked up with other girls. She's got you right where she wants you, under the thumb. Get the hell out of this one ASAP.

Christ! I didn't think you had it in you

^^^ Read only the underlined - See a pattern? ^^^

Seriously! Where's that the big red button with the word 'EJECT' written on it?!? - I need out!!!

She has you wrapped around her little finger, she says "jump" and you ask "how high?" - Address this immediately, stop putting her on a pedestal and stop jumping through her hoops like a little lap dog.

You're kidding yourself if you think this is alpha behaviour and cancelling your OWN PARTY just to be with her is totally inconceivable! - Seriously bud I try to be constructive as I can, but I'm absolutely beside myself in astonishment reading this whole topic and tough love is called for here.

You need to have control of your frame and start by being less reactive to her bullshit and not bending to her every whim, do what you actually want to do (not involving her) for a change and if she doesn't like it, then that's just too bad I'm afraid!

If you knew HB 8-9's were going to be at your own party and you purposely denied yourself that opportunity just to be with her, you need to start getting some priorities in life straight and start thinking about number one (that's yourself!).

She was really being nice to me the whole week, so I thought I would reward her.

Do you guys mean to say I fucked this up?

I hope its not too late, how do I come out of this? Advice?

You are right. I get your point. I guess I got carried away.
Now help me come out of this mess. Will you?

I was just being nice to her

I'll work on it. Thanks for your advice.

This is probably the best advice I've read on this forum. Thanks a ton.

Let me try and fix this.

Well look at the positive side. My birthday is over and I did not end up proposing her.

haha nice self criticism.

The only exit from this situation I can see for you is to GFTOW.And T stands for two,not ten.
Meanwhile keep in touch with her,but be VERY VERY busy.If there is nothing you can get busy with,than get a new hobby.Glue in the basement model planes and trains at least lol.

This is a good thing and I'm glad you didn't.

You do come across as a nice, caring guy and I am not going to fault you for that, but when it comes to women you can't let them treat you like a doormat and you need to stand up for your own principals, whether this huffs or pleases them - They will respect you for it in the long run.

The way I see this is she kind of likes you but doesn't want you (she won’t commit to you), but your also too good for anyone else to come in and try take you away from her. She’s having her cake and eating it - That’s my synopsis.

I recommend you freeze her out for atleast a few weeks whilst you get your thoughts together and make a decision is this a person you are willing to let control your life and make you make rash decisions - Nobody should ever control you!

I referred earlier to you putting her on a pedestal, she is made of flesh and blood just like you or me, so she is in no way superior to you – We are all equal, so don’t willingly hand over all your power to her, you noticed yourself she was jealous of you at one point until you levelled the playing field for her.

If you do ever decide to speak to her again after the freeze out, do not be on her beck and call learn to say no to her and stand up for your new principals.

In the end you're not in a relationship with this person so feel free meet new people and have a great time with them, if anything this will work in your favour as it will make her jealous.

She'll wonder why she isn't getting the same reactions she expects, so what you will notice if she really cares is she'll start stamping her feet because she doesn’t like it or even start to chase you hoping to get some attention, if this happens master push/pull and she'll be more managable for you - As they say "treat them mean to keep them keen".