if he won't do it .. then what??

So me and my s.o have been together for 4yrs on n off we have a 8month old daughter now who is absolutely adorable! Anywhoo my s.o and I jus recently got engaged on Mother's Day, wanna talk about being completely surprised! Especially since we've been fighting on n off for the last 1/2 months... I caught him Masterbating yet again in the bathroom meanwhile I jus got done earlier that day telling him I wanted to have sex bc it's been a while and I had cramps and sex helps cramps, & anytime I bring up sex, he either is to tired, can't keep it up.. or jus not Interested. Oh and he broke my sex toy.. bc I was using that more than actually having sex... so now I'm screwed and he's rather his fucking hand instead of a Intimate session with Us, and try to Reconnect. Like what a major Fucking DOUCHEBAG ! SoO what do I do?? Go buy another sex toy for him to break.. or tell him, If he's not going to do the deed then theirs plenty of men out there Begging for this body! - after having my daughter I lost a lottt of weight, I'm like 5'3 & only 100 pounds.. I'm really pettite tho. & apparently I look like a 'Crackhead' to him.. smh, words from his mouth. (Wanna talk about shattering my heart COMPLETELY!) I jus don't know what to do with him Anymore