I need a little support...

Day before my bday.. my husband just sent me a text after I drop him at wrk that he wants a divorce this morning...

We have ups n dwns like any blended family will. He's walked out a few times when things get rough for a cpl days. I have stuck by his side through his alcoholism n physical n emotional abuse (didn't take it I reported his butt n he got sober n doesn't lay a hand on me now or he goes to jail) but he is a dry alcoholic who's family abandoned him for staying w someone who called the cops on him. All his family is trash and he's better off away from addicts like that. Sober made him a better person! He appreciates this most days. But his ex is also mad he married me n uses their kid as a means to stress the relationship. Then His bday sucked because his mom literally wouldn't answer. Waited a wk to say she didn't want to hear from him as long as he's w me. My parents r gone. He's kinda all Iv got. I am losing the will to fight for us. As it feels really one sided some days. I have my own kids and I'm tired of having his crap like this stop me from living. I'm not sure I shld stick it out n beg him to stay,again, or if I let him go on n find himself. It hurts so bad either way. Pls be kind. Yes I know my kids come first.