Should i let go of being good friends or not?

A year ago I became really close friends with this guy, over the internet. After he admitted to having feelings for me, I soon hinted greatly at liking him back, because I did, but I never said anything too straightforward because I wasn't ready for any relationships at the time. Things were great until after 2 months, school began, and he suddenly began talking a lot less to me, whether at school or online. I confronted him once through a long email, but I never quite figured out why he stopped being such good friends. Ever since, I hate to admit I've been broken up about our friendship and still harbor small feelings for him. Sometimes he acts like he used to towards me, but sometimes I feel ignored..and I'm not sure whether I'm just sensitive or what. Having this..slight depression looms over me and distracts me from many things. Should I just let go of hoping to become good friends with him again or still try and heal what we used to have in our friendship?