So for about 4 months I've been with this boy, like not dating, we've just been friends with benefits, We hang out almost every week, but we also go to movies and stuff, so it's not like strictly sex. But he went on vacation for 2 weeks and he's been back for a week and a half now, well we haven't even seen each other since he's been back, and I've realized I'm starting to like him, which I know is something that happens a lot in an fwb(friends with benefits) relationship. But this is not what I wanted, like I've enjoyed his company and we get along really well, but I don't think I'm ready for a relationship, and I don't think he likes me, I don't want to ask him if he does cause if he doesn't I'll feel like an idiot. So I want to tell him I want to stop seeing him, but in more of a casual way, cause I don't want it to sound like we're in some serious relationship and I'm breaking up with him, But I have no idea what to say, to tell him, but make it sound kind of casual, any ideas?