I recently had a situation and I thought that people a PUA forum might be able to help me out. I have never posted on here before; however, I have read a lot of books as well as online material. My problem is that I am only 20 and I don't have a fake ID, so getting into clubs and stuff is harder for me. This is one of the reasons that I don't have a lot of experience in the field. In fact, most of the girls that I meet are simply introduced to me by other friends at a party or something. So, here is the situation that I thought you might be able to help me with:

Exactly a week ago, my friend invited me to go to a baseball game. He said that he was getting a group together and that I should come. I went. Much to my surprise, a majority of the people who went were HBs (8s-9s). The girl who I sat next to, Megan, was one of these HBs. As usual the game progressed slowly and this lent itself to a lot of joking and flirting back and forth. She seemed to be giving me IOIs. There wasn't really any time to isolate her, so I decided not to even try. We all carpooled back to the place where we left our cars. I knew that she would be at a party I was going to on Friday (the 13th), so I didn't bother getting her phone number. This was probably my first of many mistakes.

So, at the party we continued to flirt and hangout with each other. Turns out that she is a really cool girl. Everything is going well until she says that she has to leave because she has work in the morning. It was fairly abrupt and we were with a bunch of people. Again, I neglected to isolate and neglected to get a number.

After she left, I pulled one of her friends aside (who I have known for about 7 months). She immediately said that she knew why I was puller her aside. I asked her, “and why is that do you think?” She said, “you're into Megan.” I told her that I was and she said that she would probably see her at school on Monday (yesterday) and that she would talk to Megan to see if she reciprocated. I thought that it was pretty good back-up plan. Turns out I was wrong. It doesn't look like she is going to be at school this week. Her friend texted me this and said that when she saw Megan, she would talk to her about it. She also didn't want to call her or text her about it (she thinks it would be too obvious). Anyway, her I am without a number to reach Megan at and I want a date with her. The way I see it is I have only a few options: (1) wait until her friend actually sees Megan and gets back to me. (2) Tell her friend to just text her and that I really don't care if it is obvious. I actually don't know if her friend would even do this. (3) Get her number from a friend and call her myself. I don't really want to have the, “hey....I got your number from such-and-so...”...but I will if that's why it best.

I know that this is just a resume of one mistake after another; however, I was wondering if you had any advice?

Well I'm sure that you already know but never pass up on a situation because you think you can do it at a later time. You would have been solid if you number-closed at the game. If she was as into you as you say, then it wouldn't of been that awkward to isolate her for a moment. Then at the party you didnt , but you could have easily. Even if she has to go its as simple as "I had a lot of fun, is there any way I can hit you up later?"
You had the situation on lock. Just think of different ways to number-close quickly and efficiently and you will be solid

so do you think that I should talk and doing anything from here or just chalk it up to a learning experience?

i say chalk it up.
if your friend ever hits you up and says that the girl wants you to have her number then go for it. Or if you ever see that girl again maybe you can correct your mistakes, but theres no need to talk to this girl through your friend. That just shows a lack of confidence.
You've only seen this girl a couple times so just find another. You know where you went wrong so next time it won't go like this. Its a good learning experience.