This is probably a cliche question, but how can you tell if a
guy likes you?
I like this guy, but I’m not sure if he likes me :/
If he likes you enough he will initiate contact. After he does
so, pursue him. If he doesn't do so, stop wasting your time.
Men have what we call an approach mechanism, and women, a
filtering mechanism. It's a very crude way to describing our
biologies but let's leave it at that.
A man approaches women who pique his interest, and after that it
is the women's prerogative to pursue. If a man doesn't approach,
you can safely assume 2 things.
1. he is not interested. In that case, don't bother.
2. he is too scared. In that case, don't bother.