He doesn’t want to get married, I do?

Would it be odd for me to breakup with my boyfriend of five years because he won’t marry me? He’s very avoidant of the convo and mentions things like nobody wanting me because of my body and our two kids. Which isn’t true, ppl love me! I was shaped up bad before the kids lol. Anywho, it has me pretty bummed all of these excuses.. he says stuff like we can’t afford a nice wedding or wings which is true but.. I just feel he’s trying to buy time. I was comfortable in our situation if boyfriend/girlfriend but now I’m not. I feel desperate and pathetic because I sacrifice a lot for us and just want this. Would I b dumb to focus on me and the kids and move back home until I can save enough to move? Co parent? Or I’m over reacting?