So I think I'm done with my boyfriend

We've been together 10 years and we've talked about getting married on several occasions but he claims it's just a piece of paper and he doesnt care to get married and I didn't really care before either until now when all my friends are getting married and having kids. What makes me upset is the fact that when it's my time to bd he always wants to pick a fight when it's time to bd he claims hes tired and he just doesnt want to but has time to send pictures of females on instagram that are flexible to his friends. I hate this weve recently had a loss in july but he wont talk about it and makes me feel like I'm crazy like everytime I try to tell him how i feel hes like well why dont you just find someone else than. It hurts me to do this because I've invested so much time but I'm done im tired of being treated like he could care less if were together or not. No hes never cheated and neither have I but I'm just sick and tired of him treating me like I mean absolutely nothing to him so I'm packing my stuff as im typing this and leaving and not coming back.