After a argument my partner slapped me really hard on the top of my arm it really hurt and was very red and swollen I took photos as he has kicked me on the leg in the past bit like a child he is ok in other ways and generally we are quite happy but he gets annoyed easily and lashes out he's only done this twice I've told him it's not acceptable and I won't tolerate it he did apologise but I don't think he means it I told him I've been to the police and I haven't pressed charges but I could....although I have not his job means a dbs I'd required so I don't want him out of a job .My question is am I over reacting as was just a slap I'm still not sure how I feel about this