Hey guys, need some fast responses on this one so I don't repeat any mistakes with a new girl!
About a month ago I met a girl during the day, the hottest girl I have ever been with, a 10 in my book. We had an instant date where we kissed a bit. I could tell she was really hot for me. About a week later we went out again and I thought it went well, but she didn't want to see me after that.
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A few weeks later I met another girl doing daygame and it was the same deal, instadate, only this time no kiss ("not yet," she said). Tomorrow I will see her again, we are either going to the zoo or the aquarium, depending on the weather. I want to make sure I don't repeat any mistakes I might have made with the first girl. Any tips are welcome, but here is the story on the second date with the first girl:
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We met up at one of the squares in the city center. My plan was to go to a cocktail bar, but since the sun was still out, I suggested we go to the park first. She was hungry so she grabbed some food to eat at the park. We talked, she was a little bit quiet, but not too quiet. Last time we had somehow stumbled upon the topic of chocolate as an aphrodisiac, that was how I had lead into kissing -- "an experiment in the name of science." So this time I had brought a bar of chocolate to continue the experiment. She agreed and ate the whole thing. I was doing some kino, but nothing big and I mentioned that I liked the tension.
After the park we went to the cocktail bar, as planned. We sat next to each other on a couch and the kino continued, the conversation was natural and we were laughing. Kino escalated. She was asking me about my past and how long I had lived in different places. From that she figured out that I am 32 and when I asked her age, it turned out she was 21. I was an idiot and let it get a little bit awkward then. I was insecure, thinking that it might be a big surprise to her and she might be uninterested. But then I came to my senses and continued like it was nothing. My kino escalated and she was still very open. I was relieved. Eventually I said something, I honestly don't remember what, but I had my face close to hers and she went into for a kiss. We made out, talked, kino, made out, etc until I suggested we go somewhere else. We went for a beer and I let her pay this time. We sat next to each other again, talked a lot, it was very natural and I felt that she was very relaxed with me. We made out a lot at this place; we were almost having sex right there! So eventually she says that she has to work the next day and needs to go home, but that I can come with her.
So here we are at her place, and it's not long before I start making out with her and you know the rest of the story
The thing is I had a little bit of a problem with my erection. I think I might just have been nervous because she was so hot and I felt pressure to deliver! In fact now I remember something else I said earlier which in retrospect seems like a stupid thing to have done: I had actually told her that she makes me nervous 
So anyway, we didn't bang very long. The foreplay was very good, but the sex itself was mediocre at best. So we just cuddled and she asked if it was her fault and I assured her that it wasn't; that this happens sometimes, there can be many reasons and it's difficult to say why. She said that honestly she was enjoying just lying there, as we were cuddling so we left it at that. When we were sleeping she didn't touch me at all, just kinda stayed to her side of the bed and I mostly stayed on mine (with my blue balls) because it's more comfortable. I didn't think much of it. The next morning I started cuddling with her again and we made out a bit. I didn't have any more condoms (she didn't know that), otherwise I might have tried again.We had breakfast and everything seemed fine, the conversation was natural and everything. When we parted ways we kissed again and I said let's figure out about doing something together again soon and she agreed. A couple days later we exchanged a few SMSs and everything seemed fine, nothing sexy though. Maybe I dropped the ball there too. Then a few days later I tried to call her to set up our next meeting but she didn't pick up. Some hours later I got a message back about us going our own ways. When I asked her the reason, she said chemistry and age. If she had just said age I wouldn't have had a problem with it. It would have been clear and it is just a fact I can't do anything about anyway! But I really felt like besides the sex, our date went really well! What did she mean by chemistry? What did I do wrong? Was she disappointed about the sex and didn't want to say it in a way that would reveal she is a bitch? She sure seemed like a nice girl though...
Guys, what did I do wrong? Was it just the sex? Was it actually just the age and somehow she thought bring in "chemistry" would soften the blow (it did the opposite)? Or something else? I am even thinking maybe I moved too fast. Maybe I should have kept her wanting more; maybe if I really like this other girl tomorrow I should not have sex with her yet. Then again, I don't want her to feel unwanted.