Is he the type to get physically violent? Having someone with you isn’t a bad idea. I think he might also show no reaction acting like he doesn’t care or might not even believe you.

Divorce is no fault, you don’t really need any reason to divorce or prove anything. Divorce is relatively simple under your circumstances. I am not saying it’s simple from emotional stand point but procedurally speaking. It doesn’t matter if you are divorcing because he is violent or because he chews with his mouth open. It honestly makes no difference in the eyes of the law. Court doesn’t care about it in regards to following up with officially divorcing you. It’s only complicated when there are large assets and funds to divide and property to split and sell and custody and child support issues or demands of alimony (in longer marriages than couple of years). None of that pertains to your marriage (procedure wise). You actually don’t even need a lawyer to file for divorce (you would though if he starts demanding something that is yours, but again it would be no matter how he behaved during marriage in terms of splitting possessions, courts won’t care about his behavior)

Having said that you absolutely should call police if he puts your hand on you or threatens to do so.