<human>: Condense the text into a few key points

I met this girl about a month or two ago, and we hit it off really well. We hung out a few times and really enjoyed ourselves. We ended up kissing, and only then did I learn that there was another guy in her life that she had been seeing for a while. She told me that she was hesitant to make it "official" with him because she didn't know if he was the kind of person she wants to date even though she cares about him (frankly he sounds like kind of a douche). I figured that I was okay with that, because what's wrong with feeling things out a little bit?

She and I have been spending more time together, and it's been extremely enjoyable for both of us. She says I've been making her happy, and even her roommates are noticing it. The problem is that the longer this grace period goes on between her and her guy friend, the more anxious I get. She tells me all these sweet things, but I can't help but worry she'll wake up the next day and decide to brush me off and stay with the other guy. We've talked about this, and she's told me that they plan on talking about their relationship a few weeks from now and making a decision (cutting each other loose / staying together) then.

I understand that we've only known each other for a couple months, and that that might make the situation seem disingenuous, but I think this girl is really great and I'd genuinely like to make her mine. **So what is my best shot at guaranteeing that she'll decide to be with me over this other guy that she's had problems with?** It's such a strange mix of patience and persistence, and I'd love to get some outside feedback.
<bot>: I've been spending quality romantic time with a girl who is taking a break with her constantly partying potential boyfriend. How can I use my time with her to convince her that I'm the better choice?