Bf grabs my arm a lot.. is it OK to do?

Whenever me and my boyfriend fight I always try to walk away and he yells my name and grabs my arm and somtimes it leaves bruises. But he says its OK because he has a right to grab me if I'm trying to walk away during a fight... is it OK for him to do it? I agree trhat I run away from fights a lot but it hurts when he grabs me
Bf grabs my arm a lot.. is it OK to do?
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