Monkey branching relationships?

Whenever a girl is looking to move on from her guy
But she won't leave him she's looking to cheat or get with another guy while with her boyfriend
When she's into u and your into her but u won't do it
She then moves onto another guy For sex

Does that mean I need to forget about her even tho were attracted or wait till she's single?
Is she trouble if she behaves this way?
Does this mean she never had any interest in the first place even tho we are attracted and have chemistry?
Updates
+1 y
Any ideas
Monkey branching relationships?
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