Breaking up

Hi I'm 26 weeks pregnant and I think I need to leave my boyfriend. My heart is so broken but I've given him so many chances in the past 8 years to fix things. I want someone to be happy to be having a baby together and support me to wanna do stupid stuff like take maturity pictures with me or even post me on any social media (he hasn't even posted anything about us having a child and deleted my comments on his pictures) or just go for a walk or do nothing together. All my bf ever does really is sleep next to me at night I don't trust him anymore and I don't think he respects me I found dating apps on his phone months ago he deleted them but he's still never home. We are either fighting or pretending like everything's okay I love him but I don't think I can keep fighting for someone who at the end of the day clearly doesn't want me. I don't know how to feel better right now especially being pregnant I'm so depressed. I don't think he's going to change so I know I need to leave but it's so much harder than I thought it would be.. please give me advice