Boy likes me but I don't- work problem?

There is a nice guy who likes me at work. He asked me if I wanted to go eat with him at a restaurant and I declined in a nice manner. A month later he says he likes me, feeling sorry for him I hugged him-maybe wrong move- and said I liked him as a friend. He was mad yesterday and admitted to me that he was sad because he couldn't be with me. I said I don't have time for him because of college, work, and home and that he'll find someone better than me who can hang with him. He replies that time is not an issue and I don't know what is good for him-meaning I can't tell him to find someone else and that waiting for me is NOT wrong, according to him-and he is willing to wait. My mom says I should just plainly tell him I'm not interested in dating at all, which is entirely true, and there is no point in dating if I'm moving this summer, but I think he'll probably still insist on going out. He says he is not the type to show his feelings so when he admitted he likes me I noticed fidgeting-it must have been hard for him..I hugged him as reurance that I don't hate him but I don't know if I'm leading him in the wrong direction with these hugs. My co-workers say I'm flirting with him but I really feel no attraction whatsoever. so what can I do to actually end his crush on me and not have everyone think I'm flirting with him. (I know I should stop with the hugging). Thanks.