What are signs a guy likes you?

I think my guy friend likes me. Im not sure. What are some signs he likes me???

Lingering eye contact, walking close, always finding an excuse to be with you, and jabbing you repeatedly with a sharp pencil.

lol um... he might tease you... he might try to impress you... he'll smile a lot...

...theres a lot of signs, if he stares at you, smiles at you a lot, constantly runs into you on pourpose, stalks you or knows where he can atleast see you once a day