Thanks, but No Thanks

This guy is giving me extra attention. It's just so frustrating that we were good friends, everything was great, then his extra attention and gestures are starting to make me feel uncomfortable. He hasn't really said anything, just his actions show he's interested in me. So I really can't say anything. I've been avoiding him, and I guess I should continue to do so. It's just that it's hard when we've been friends for over a year now, and we have a lot of common friends, and I share a class with him. Guys should consider if the girl is somewhat interested in them first before doing anything, because they just ruin things when they start doing things. It just make things awkward.