Most Helpful Girl
He may have feelings for you, but what he is doing is unfair and he is
stringing you along.
There's no way of knowing that anything you have is solid and is definite.
Explain this to him.
Tell him you want to only be with him, but if he can't give you certainty
it's unfair for you to wait around on something you don't know
that will be there.
You have to be in a relationship with someone in order to cheat on him.
Since you both are not together then you are not.