At some point you need to start learning to define yourself as an important individual on your own terms instead of by who likes you or "goes" with you. Use this rejection as an opportunity for intellectual self-discovery and learn to feel good about yourself.
The guy is over the other person and likes you!
Move on find another guy
If he likes you, then he won't have the other girlfriend anymore.
Go to the guy and tell him to tell his girlfriend that he has a crush on you and that he thinks they should get over each other.
He likes you for sure
== == == ==
Kiss them and see what they do
When he is sure he likes her.
To be sure whether or not a guy likes you, you could always just ask. If not, have a conversation with him, ask him if he wants to hang out with you.
go with the guy she kinda likes if she goes with the other one her friend will get mad at her and not talk to her anymore and you should let your friend be happy with her boyfriend
the only way to be really sure is to ask him
If he pays no attention to you or if he don't act like her likes you no more