Yes he surely comes back because when he realizes your importance and what you meant for him then he will badly apologize and come back to you, fully transformed into a good guy.
Many BFs, or boyfriends, are not abusive. If a boyfriend is abusive, the girl should leave the relationship and file charges. Do not keep going back to an abuser.
If you have tried to talk your friend out of going back to her abusive boyfriend then you have done all you can as a trusted and loyal friend and this means your friend is a slow learner. Just let her learn the hard way and be there when she needs a shoulder to cry on the second time around and hopefully she will get the message by then. Young woman (woman of any age) will often want to go back to their abusive boyfriend or husband because they have low self esteem.
to control you. abusers want total control
I wouldn't say that was abusive because you bit him first.
harassment! and the start of an abusive over controlled relationship
You don't you broke up for a reason and if you get together with him again you'll just realise it all over again and possibly be tied into an awful or abusive relationship you don't want to be in.
You should definitely go. An abusive relationship is unhealthy for you both physically and emotionally. If you continue to stay with that abusive person, you will more than likely end up being attracted to more abusive people in the future. In fact some abusive relationships can lead to suicide and/or being murdered.
It's in the best interest of everyone, most especially the abused woman who has abusive tendencies, to seek counseling for herself. She should also stay out of relationships until she has adressed why she is abusive to others. Getting involved too soon would be a rebound relationship. Even if her ex was willing to take her back (and he might not be), it's unhealthy to jump from one relationship to another in hopes of being saved from a bad situation, or believing all personal problems will end if they get with someone who once had feelings for them. The abused/abusive person must heal themselves first before they enter a new relationship.
If not abusive, it is at least unstable. You may want to re-think continuing with it.
IF YOU HAD A GOOD RELATIONSHIP BEFORE.
if he thinks it's ok then sure.
It depends on what caused you to break up. If his behavior hasn't changed, you'll have the same problems with him you had in the previous relationship.