Sex positions

My boyfriend and I have been in a relationship for around 6-7 months now and have been having sex for only about 3-4 of them.

We recently discussed about spicing up our sex life a little with things such as slapping, degrading etc. He said he was afraid he would hurt me or my feelings but I assured him I would be fine and that if he felt uncomfortable at any time, he didn’t have to do it.

Around a day or two ago, he suggested a new position. I personally don’t want to do this position because it makes me feel uncomfortable and I am insecure about how my body looks in that angle. I told him I didn’t want to and he got annoyed, to the point where he hung up the call and even ignored my texts.

I’m supposed to see him tomorrow. What do I do? Should I just take one for the team and try the position with him?