My boyfriend told me it was over this morning and left to his step moms.. Every time he says its…

My boyfriend told me it was over this morning and left to his step moms.. Every time he says its over he always comes back but I don't want to keep arguing and going back. I want to work it out, but I don't want to keep getting back together and arguing all over again. Yesterday he said "why did I even purpose" it hurt me.. He threw the ring in the garbage last night and I dug it back out this morning.. I don't know what to do. I said mean things also but it was after he questioned purposing... what should I do