how can you tell if a guy is interested in you?

If I like a girl I'll usually try to get to know her a little at first and maintain CONSTANT eye contact. I say if he treats you like a friend he likes you. If he picks on you a little for stuff you do that might be another sign. Besides, why would you want a guy that's a kiss-asser all the time?

Well with many guys I've noticed they take interest in something you love. My fiance now never listened to the music I did and when we were friends he would tell me just leave it there thats a cool punk song. I would be ecstatic. Lol. My fiance also when we were friends never would look me in the eyes he would but it would be for like 2 seconds. When I speak to someone I always look them in the eyes! Well when I wasnt looking at him he would be looking at me. I would catch him all the time. It was adorable.

mostly the regular hints eye contact, great conversation out of the blue, mostly cares what you have to say and not others, basically all attention on you