Husband gave me ultimatum

Long story short, we’ve had a lot of issues in our relationship before we got married last year about how to resolve conflict resolution. I told in my anger by showing passive aggressiveness and being petty and saying hurtful things that shouldn’t be said to a partner out of hurt and I admit, sometimes I am a bit childish and could use some growing up. But I want to grow and move on from all these flaws. I’ve sought out individual therapy, found a new hobby, and really finding myself constraining my anger when we get into arguments. But it’s gotten to the point for my husband that he cannot take me lashing out any longer. And I know it’s completely my fault and something I really need to work on. I care enough about this marriage so much I will do anything to change. I feel guilty everyday that it’s caused my husband to give me this final proposal, live separately for a week, and doesn’t feel comfortable living with me until I manage my emotions.

I really feel embarrassed and have emotional disgusting . I may have an underlying disorder who knows. What else can I do to prove to my husband that this time im serious about the commitment we made to each other. I can see he cares a lot about me and wants to do the right thing for me so I can get the help I need for anger management. But idk who else to turn too for these sort of things. We are young, in our twenties .