Winning my ex-girlfriend back. She has a boyfriend. First few steps have been taken, now topics like ...?

just be cool and keep communicating with her. as long as you don't do anything obsessive, she is bound to come to you for good. just be careful she doesn't take you for granted and string you along while keeping her current boyfriend. i would say she needs to be making a clear move pretty soon, otherwise, i would bail. you don't want to fall in the "friend zone" and be her shoulder to cry on while she continues to date the other guy, but you also don't want to preure her too much either, it;s a delicate balancing act, but it can be done if you are smart about it and keep your cool. good luck!