I'm really interested in this guy- how should I go about it?

Okay, so first things first, I know that this is an important detail because of the "bro code"- this guy happens to be my ex boyfriend's friend. Like, the only way I know him is through said ex boyfriend (who I broke up with just about a year ago). Anyway, moving forward. I've met him twice now, both times well after I became single. This guy is a total comic book nerd, he's sweet, funny, has great taste in music, and, not to mention, is super cute. And he seems to be a gentleman, as both times we were at the bar, I'd go out to my car for something and he'd walk me out every time, and he's offered to drive me home if I felt unsafe on the road (which would put him out of his way at least half an hour). Last time we were at the bar, I finally turned down a drunk guy incessantly hitting on me. He expressed that he commended this drunk guy for having the courage to at least try, because he wouldn't knowing he would not succeed, which shows a lack of self-confidence which may be an important factor. Anyway, the last time we talked he and I recommended a movie for the other to watch, and he said that I would have to report back to him after watching said movie. So I said, "next time?" And he agreed. (Probably a good opportunity for me to get his number, but I'm just as awkward as he is). I think this same group of friends is supposed to have another get together at the end of the month so we'll see what happens. I honestly have no idea how to go about this. What do you recommend??