Sweetie i'm so sorry
i used to cut but luckily i told the guy before we started dating and he made me stop he helped me get through it and i think that if this guy can't deal with you cutting then you're probably better off i mean its just one thing what if you had a bigger problem would he just leave? i mean he seems like a jerk. is he even worth it anymore? you'll find someone better. someone who can accept you for who you are and help you if theres something wrong and not just run away.