I don’t want to stay married

So i have a beautiful 3 year old. And am 11/12 weeks with a new blessing. I have had a rough relationship with my husband. He cheated multiple times. Gave me a STD. Walked out on us. And after trying to make it work I just feel fed up. I’m not working and plan on keeping the peace until the baby arrives. But I’m sick of him and thank God he’s a trucker and gone 85% of the time.. He doesn’t protect me, he always chooses his 2 daughters from his first marriage over me and his son. His family isn’t involved in my sons life. SMH.. I am over it... pray for me and this pregnancy ❤️