Idk what to do anymore

Ok so I have been dating this boy for a year and some change but, I just feel like he doesn’t want to be with me anymore or he just isn’t showing it like he used to. All he ever does is “tease” me by that I mean he makes fun of me and apologizes after. He makes me feel like my body is ugly that I don’t have worth anymore. One of the things he told me is “95.5% of the girls here have better bodies that you” and when I started feeling bad he asked me why and I told him and he got all upset because I said I feel insecure in our relationship. On top of that he is always looking at other girls which drives me f**king crazy sometimes I wonder if he even looks at me the way he looks at these girls. My friends are saying they think it is a toxic relationship and they are seeing my personality change from a confident young woman who doesn’t take anyones sh*t to a shy, insecure, quite girl who takes all the abuse from her boyfriend. I guess I’m not his shinny new toy anymore which really does hurt cause I care about him a lot and don’t get me wrong he wasn’t always like this but, the past few weeks this is how he is always acting. I’m planning to breakup with him tomorrow (because I want to do it in person not over the phone) and would really like some advice on how because this is my first ever true relationship and I would love some support. I’ll try my best to keep you guys updated and thanks for reading this I know it’s a little long.