Serious problems with partners temper?

The problem is he doesn't trust you and is now on the look out for the next time you mess up - he is insecure as a result of having his trust broken (you texting another man to confide in him about your relationship - I would be devastated and angry if I discovered m partner had done this to me). You are able to move forward from this as you aren't the injured party but he may take some more time to learn to trust you. The hurtful words he says are just anger at you. You need to work on this together rather than running away from each other. If you are genuinely scared of him and being physically hurt then you should end the relationship anyway.