I got back to him yesterday. I don't see a problem with not talking to him that long. Just because someone is contacting you a whole bunch does not obligate you to reply. After I got in touch with him again, he seemed to take it well, saying he understood that I had probably been busy (which I was with a full load of classes and part time job).

Only thing is, and I know everyone has smart phones these days so emails can instant - he replied like, immediately. It was late at night (for me) and I had since gone to bed (except now I have woken up and can't get back to sleep). So I hadn't replied back. But that didn't stop him from writing again an hour after sending me the first message.

Because of that I think I will wait longer to get back to him. I probably sounds like a bad thing to do, but it is like when someone is riding my tail-end while driving, makes me want to slow down even more till they get the hint. Nothing against him, I have already told him I don't want to get in touch that often cause of being busy. Which I am.