Why do I feel this way?

Me and my boyfriend have been together for almost three years. Our relationship has had so many rough patches but right now we are doing pretty good. Today I have kinda catching myself distancing from him lately though. We haven’t been able to see each other due to social distancing but I really haven’t even been interested in talking to him at all. I have been having problems with physical attraction to him lately but it really hasn’t effected my actual feelings towards him so idk why I just have been wanting to be to myself lately.