Did the girl says she love the guy?
If not, this is a case of miscommunication and misunderstanding.
Maybe the girl is too polite and friendly and the guy mistook that for entertaining.
But, anyways if the guys' love is pure and genuine he will simply let the girl be happy even that happiness means he is not part of it.
Just be happy.
If it is your destiny, it will find you.
No need to force or coerce things.
Let things go its natural flow and course.
Smile and always be happyšš¤