I F18 considering breaking up with my M18 first long term boyfriend and I don’t know how to handle it. Advice?

I know this must sound so menial considering some of the posts on here but I don’t know what to do. I care about my boyfriend, he’s kind, very funny and charismatic but I feel like I’m over it and I have been for a while. I don’t want to have sex with him or go on dates, I don’t want to call or text. My mother has all just been diagnosed with stage 2 breast cancer so I have bigger problems. I feel like I’m over it but every time we go to break up I feel anxious and I regret it so I go back. We’ve been together 3 years this year and of course we’d still be friends but I wish we were just friends in the first place. I know I want to date other people and I can’t give him why he needs.

Do I just do it and get through it? It’ll ease eventually but it stresses me out. Once again sorry this is so stupid I just don’t have many people to talk to.