my fiance and I are on the verge of splitting up. I want my baby to have her mom and dad together…

my fiance and I are on the verge of splitting up. I want my baby to have her mom and dad together and not a split up family. its my choice really, I love him but I do not like him as a person. his past is full of stupid bad choices and I just feel like he won't make the right choices in the future, one other big issue is I'm tired of his other daughter coming over here and doing whatever she pleases. I'm not saying she can't have fun or be a kid all I ask is that she picks up after herself and is quiet while my daughter naps, I could ask her to do these things but she won't listen to me. I won't tell my fiance any of this bc I know he'll blow up and say I'm being a bitch and I don't like her. another issue is he looks at porn. I found out while pregnant and obviously I was hurt bc I was fat and carrying his child. it bugs me that he does it bc for most of my pregnancy and til now I haven't worked, I'm always at home. I could understand if I was gone but if I am here and he's sneaking around to view it I just see it as disrespectful. I know he won't compromise on either issue and I'm honestly tired of feeling the way I do, just flat out no respect from him or his daughter.