Dude. Sounds like you're good looking and she wanted some dick on the side but you took it way too seriously. Especially the part about asking her and her friends all these questions. You must be really really good looking if you made this many flubs in a row and she was still down. Ditch the poem ASAP. Forget it.

Stop putting all this in terms of love, especially on her part.

Good news is, it's not too late at all to bang her. Bad news is that you have no idea what you're doing and have a very unrealistic view of love and relationships. The other bad news is the fact that she has a boyfriend probably means she's not looking for a second one, many women have a safe reliable boyfriend and get their kicks on the side.

PM me if you want to talk man-to-man.