Do you ever ....

Do you ever just look at your SO and think they’re ugly and why you’re with them ?

It doesn’t happen often but I do get those thoughts just curious if it was normal or if I’m just not that into him. We’ve been together for almost 4 years now since we were 16. Sometimes I just want to do my own thing and not be in a relationship but he doesn’t understand that, he thinks I just want to meet a bunch of new guys to have sex with 🙄🙄🙄