Husband cheating while pregnant

So I have posted about my story before. I found out on thanksgiving my husband was cheating with a girl from his job who is married and they slept together. Well I kicked him out from the house we bought in January and have been raising my 18 month old alone well pregnant. A week after I kicked him out it was Sunday and that was the day we agreed for him to see our 18 month old and he asked if we could talk. He told me he wanted to try to work on things and this and that. I was like okay we can but we aren’t living together for at least a month or 2 till we start therapy. Well fast forward to Wednesday Morning I get a call from his sister asking me if he was with me because he left his car and phone at his house. Well obviously he wasn’t so I went to his parents and went through his phone and he went out with an ex from high school and got a hotel. Like he did this again !!!! It is time I just walk away from the relationship which is hard bc we have been dating since high school and that girl was just a girl he talked to when i left him when I was in college we broke up for a year. But my dumbass keeps thinking maybe we can be together 😞 I need to walk away and never look back.