Jokes about my weight...

My boyfriend of almost four months makes jokes about my weight. This has been an issue from the beginning and we talked about it on a few different occasions until he finally stopped and apologized, saying how awful he felt that he made me feel bad about myself, inadequate, etc. etc.

...just today he made a comment about my weight and when I asked him why he said he wanted to, "test the waters" and see if I'd still get upset.

I'm extremely upset just with the fact that he'd stop and think, recognizing that the jokes make me feel bad, and still do it.

He says he doesn't like/want to "censor himself," I told him if he didn't want to filter himself he could be with another person and I hate saying such ultimative things like that, but I'm so hurt and just confused.