<human>: So my[19 M] friend, Dan, started having these game nights about a month and a half ago. They've been once a week or so. At the first and each of the following, his girlfriend, Leah, brings her friend, Seala[19 F], to them because she is staying with Leah for the summer until school starts back up. Seala and I hit it off right away, she's cool and I'm not an ass (I don't really give myself enough credit, but I don't *tell* myself that). At each of the following nights, I seem to be getting signs that she's somewhat interested in me, but I haven't been in any sort of relationship so I can't really say. 

 I feel the want to ask her out, but I'm having trouble approaching her because I feel like I'm just not good enough for anyone. I have problems at home that I won't discuss now, but they just caused me to stop thinking about my future in general. I have started pushing myself more since I graduated high school, but when I think about Seala thoughts of the future, a brighter future, sprout in my head. I feel that I could make her happy and that she could make me happy, but I just want to get over this *hump* of doubt and take a leap of faith because I've let chances in the past slip by, and I don't want to again. Advice?

Can you condense the text into a few key points?
<bot>: Never been in a relationship before, she's a really cool girl, I can't work up the courage to ask her out. Just need some advice on staying calm and asking her out already.