Is this the end of my relationship?

I (29F) don’t think I’m attracted to my boyfriend(27M) anymore and it’s scaring me. We’ve been together for 3 years and have lived together for 2 years and for months now, I dont like being touched by him, I feel “the ick” when we kiss and I definitely don’t want to have sex. He’s very thoughtful and is a good boyfriend to me but I’m just not feeling it. I often feel irritated with him and just want to hang out by myself. Because of this, l’ve been kind of distant and I know he notices but idk what to do about it. It feels “wrong” when I force myself to engage in any kind of intimacy with him. Idk what happened. I still love him and care for him and want the best for him but I don’t think I’m “in love” with him. Please be nice, I promise l’m a good person and I don’t want to hurt him but I can’t help how I feel.

TL;DR: I think I might need to break up with my boyfriend and I’m scared. I don’t want it to be messy.