Am i doing something wrong?

ok so I have a friend who I use to be very close too. but then all of a sudden she decided to ask out the boy that I was in love wit even thoe she new! after that we became very distant. she didnt go out with him becuzz he wanted me (yezzz!!! lolxz) but...

I never relli holded a grudge on her. now she goes out wit this boy and he is sooo kutee!! be we never relli talked so I didnt pay attention to him. until a couple of days ago he saw me and we started talking. he then wrote me over fb and then we started taling and 5 minutes later we were flirting and he was telling me that he wanted to break up wit his girlfriend and that he wanted to be with me. he wants to kiss me relli badly and hes tried to in school but I feel rong doing it. even though me and his girlfriend arent close anymore do you think I should go for him... or just leave everything on the dl and be girllfriend #2??? idkk...-___-

I would say go for it ; Because ya'll aren't close and he doesn't want her anyways ! sooo obvioulsy she is not doing something right (: