Struggling with my relationship

Ashley

So we have been together for 9 years and he has an 17 year old daughter and me and her have had problems since we got together her mom is completely out of the picture we got together when I was 19 and she was 9 and I have tried my best but she treats me bad like a ghost and expects me to bow down to her and her dad kisses her ass constantly. We have a 5 month old together and I’m wanting to move out cause things just are not working out and his family treats me like shit I had surgery today and all they care about is the baby I’m just so over it what should I do???