<human>: Condense the text into a few key points

I've known him for 3 years and we have been very good friends for about 1 of those years. About a month ago he told me he liked me as more than a friend. I said I didn't share his feelings and we carried on being friends. However now my feelings are starting to change. I've gone from being certain that I felt nothing more than friendship for him to being very confused. What do I do? Do I tell him or do I wait?  Sometimes I feel like we would be perfect together and other times I feel like it would be a mistake. 

My other concern is that I have intimacy and rejection issues. I don't know whether my hesitance is due to genuine confusion of feelings or whether I'm letting my fears get the better of me. I'm terrified that I'll tell him that I share his feelings but then find out I don't, or have fear take over and back off. I don't want to hurt him. But I also don't really want to sit in silence in case he moves on and I regret missing my chance.
<bot>: Conflicting feelings over whether I like my friend as more than a friend. I have no idea whether I should tell him how I feel or wait until I'm more certain. Only concern is what if I'm NEVER more certain.