Problems

My boyfriend treats me like I’m nothing one minute he loves me other minuet he’s single even while we are on good terms he talks to other females and he knows. I Have his password he threatens me and say he is going to screw one of my friends then two days later or even a couple hours later he would say he say stuff like that because he was just mad at the moment. And I will ask him why are you talking to other females he would just say I’m only texting them and the reason why he is doing that because he think I’m talking to other guys which is false I don’t know what to do I have been going through this for 6 months now Im tried of then when I dont answer his messages or calls he will start begging me and pleading him to take him back and that he is sorry