What should I do about him? Let go?

GUYS, GUYS, GUYS! Sounds kinda like fate. What I probably would do in this situation is give you're "guy" friend time to heal his heart, who knows it could take a lot of time, but if you really like him than Im sure your willing to wait. Guys alot of times can send mixed messages and have you fooled, making it seem like they really like us, but they really dont. Then again he could like you...Since he's not wanting to be in a relationship right now, although you like him your job as a friend should just be supportive, show him that you care for him, and that most of all he can TRUST you! :) I hope my advice is somewhat helpful.