My (24M) girlfriend (25F) has rough kinks that make me feel guilty. Do we just stop?

I’ve been with my gf for about 6 months and it’s been really wonderful. She has strong kinks and thats fine. I’ve made my peace with it, sort of. It can be really enjoyable and fun and I try my best to be careful and considerate with her. The problem is that these kinks all involve hurting her physically. All are tied to physical violence against her in bed. I’m pretty sure this is perfectly normal but it makes me feel like shit. There’s obviously a risk of serious harm here but I feel bad about hurting the person I’m dedicating myself to romantically even at their request. The other day she asked me to slap her and do other things to her, and then she was crying. I stopped immediately and then she was begging me to keep it going, but I simply couldn’t. I can’t cope with this, not with “aftercare” or her affirmation that it’s all good. Again I’m pretty sure it’s fun and arousing to her but for me it just makes me feel like a predator, a woman beater. I’m not sure what to do except cut it off. I can’t make her change her choices.