Ok, I met this guy about two years ago, and hated him at first, but then he became like my bestie. We consider each other as brother and sister, but I'm starting to fall in love with him. I want to tell him, but if he doesn't feel the same I don't want it to affect our friendship. What do I do??

You should flirt with him on the slick and be super nice to him and be there for him when he's down and stuff and be nice stuff like that to show your good girlfriend material

That's the risk we take when we have feelings for a good friend. We take the risk of rejection, or we don't take a risk. Your feelings have changed, gotten stronger, so ask him if his feelings have gotten stronger like yours have. Beats playing games in case he gets a girl friend, and doesn't have as much time to give his bestie, sister the same attention as he did.

That would affect the relationship too!