There is this guy and he seems kind of shy and seems like he likes me, but my friends (who don't know him) think that maybe he doesn't know that I like him. So I let him know in a note that I like him, etc. Now he waves at me every time he sees me, says hi if we are close enough, but that is it...hasn't asked me out or anything yet. Does the constant waving mean he really does like me then? How long should I wait for him to ask me out or something before I consider it a lost cause or that he isn't interested after all? We had been flirting off and on for a few months prior, so it isn't like I just let him know I like him just randomly out of the blue.