I’m sorry, but he is abusive and under no circumstances should you go back to him. He has shown you patterns where the abuse is a consistant issue- the cell phone, the dining room chair, and now it’s getting worse and more frequent. Find a shelter if it is possible, get a restraining order if you must. But do not get into a position where he can continue the abuse, because one of these times it will not be a cell phone or chair, it will be you that he throws and breaks. If he is serious about changing, then he needs to prove it- that would include getting into couneling, going to an anger-management program, and proving for many months that he has changed- and during NONE of that time should you be living with him.

This is just my opinion, of course. But we have all seen cases where someone who abused went back because the other person “changed” only to be injured when they find out that is not the case. Best of luck to you.