Point the third: I think 'I'm working my ass off' was probably a genuine 'holy shit, I'm busy today' and not 'I don't want to talk to you right now'. If he read your email, it could be that he needs more time to think about it; but there's also the possibility he hasn't read it, and has just been too busy to get around to it yet, and that's okay too. I think if he were to have read it and be not interested, he's old enough that he'll fit into one of two groups that make up like 95% of the population: either he's matured to the point where he'd have the fortitude to say 'look, I appreciate where you're coming from, and I'm not interested in being more than friends, etc, yadda yadda, and so on', or he'd be a juvenile wanker and just flat out avoid talking to you. There's not usually middle ground on that sort of thing. Like you said, no news is good news, so, I'm guessing that he's probably just truly busy and hasn't made it around to you yet.