Hey, I'm sorry this is happening to you. Although I don't feel like I'm qualified to give you any advice, I do understand you not being able to say no as I have gone through that in the past and am slowly learning to set boundries.

And yes I can understand your feelings around thinking "well its been this way for so long, what would he think if i all of a sudden say no?".

So, I guess the thing is, you have to choose between trampling your own feelings or his... and yes it can be hard to say no, because you're used to not saying it.

Have you tried talking to him about this?
Couple therapy perhaps?

I'm also sorry about your stitches, not sure if that counts as abuse? although in my head it would, because I'd think that stitches are necessary for you to heal and if he tears them up, isn't that going to stop you from healing? (sorry, if I'm not making sense just ignore me as I don't know much about stitches).

Hope you feel better! i am sure once you learn to say no and stand up for yourself, you'll feel a lot better and you'll feel more in control, not of him, but just in life general.

Cheers!