Hi, I need help.
I went to a bar just 10 minutes before it closed. There I saw a girl I got eye-contact with and thaught she was a school-mate from senior-high. She approached me and recognised me from where I work as a cashier and was not the girl I thaught she was.
I introduced myself to her and shook hands.
So we talked for a while and she seemed nice and she seemed to have taken some beer too.
We talked about where she works and where she lives and how many times she had been there and if she is a student. The music was loud so we speaked closely in each others ears. The conversation must have lasted for five minutes and the tone was great.
Afterwards she said she had to meet her friends again and after some seconds I decided to ask for her number.
She already turned her back and I grabbed her maybe three times on her right shoulder before she noticed me. (She a had a thick leather-jacket.)
We went back to where we stood and I pulled up my phone and gave it to her and asked if I can get her number. Then she gave me this what-the-f-do-you-want-look and looked a little surprised too.
If I knew this look was coming I would not have asked for her number.
I got her number and she asked if I would call her and I said yes.
I called her back so she could get my number too.
I was surprised and tried to hold up a smile and laugh.
She asked me why I wanted her number and I said she was nice (friendly nice). It became awkward for not only did she gave me that look but she seemed to think a lot. I struggled holding up my facade so I asked her flat out what she was thinking of. She became horrified and thaught she was not allowed to be there with me. That I tried to push her away.
I calmed her down and explained that it looks that if she is thinking a lot. She said that she thinks all the time. After all this I ran away.
After a while I got a text message from the operator telling that she tried to call me. This is strange for I should only get this when my phone has been turned off which it was not.
I am having difficulties deciding what to do. Should I drop her or should I contact her and if so in which manner?

You can 'keep' her if you want but it may not be your best bet. From the sounds of it it looks like she may want to be only friends, but then again she was kind of drunk so it could be up in the air.

My bet would be that you are slotted into the friendship zone by now, but you can always give it a shot mate! nothing to lose.

- Memento

We'll 1st off, the girl sounds psycho as is the case with most women.
2nd, if she texted you without you even saying anything, she's majorly on your jock and is probably pyscho (2 of my last gf's who ended up being total basketcases pulled the same exact shit).
BUT I COULD BE WRONG.

And No, You're not in the friend zone because she texted you in the wee hours of the morning. Like guys, girls don't wanna be just friends...speaking of which....
Don't even do this, "lets be friends" bullshit. Stop lying to yourself, and to her. SHe got quiet and thought alot because she felts you rejected her with this friend line (it also sounds like she has 0 game/confidence btw).

If you wanna go for it go for it, but i'll give yout 5:1 odds she's an overbearing psycho.

dude u should have been in more control.... grabing her shoulder 3 times shows u are desperate for her #. and from the conversations.. it didnt seem like u NEGed her. so hopefuly u will learn from your mistakes.whether or not u decide to keep contact with her is up to you... but it really dont seem she is in to you from your descriptions of her facial x-spresions(couldnt spell it right.. mind fart haha) but ya do wat u want with her

Skotch

_________________
"do unto others wat has been done to you"-TOOL

I think with a little fore thought you will not forget to ask her number while she is there. I seem to recall Mystery or Style saying that you NEVER approach a girl from behind... well it does have its time and place but this was not one of them.

If she suddenly went psycho on me I would probably have hammed it up and pretended she had multiple personality disorder and been like "... can I speak *her name* or is there only Zuel!?" and then just shrugged it off.

OR

Go back to to her group and have a random girl prop handy and be like hey I think you dropped this back there and when she declines it, act like you just remembered that you forgot to get her number. If she declines you then then you just saved 20 cents and a lot of stress on a pointless call.

Personally I would have acted like I had just won a prize when she said it wasn't hers. But such is my humor and either hilarity or humilty... mostly hilarity as I laugh at my own jokes, ensues