Relationship advice. Help!

I had this friend who was always very depressed. So, I used to help him through his days like I would help any other person. He's very kind, nice and loving and he started to have feelings for me. We used to stay up all night and talk and tbh, it always felt nice. And I initiated the where-is-this-going conversation and we came to the conclusion that we have no future but we can stay together without putting any labels. 
We started having this more-than-friends kind of relationship which was nice in the beginning but later, he got so clingy that it's exhausting me now. I feel like I don't like him the way he does. I feel guilty about it, but I can't make myself love someone, can I? He's a really nice guy, but maybe we are both looking for different things. And we know it's not going anywhere. I want to break up with him without hurting his feelings. He's really sensitive and idk how to break up. 
Pls help!