Need advice..

My sons dad & I were together for a yr and half we broke up because he cheated on me when I was five months pregnant I let it go we have a baby on the way I knew it could happen again I trusted him enough it wouldn't but at eight months pregnant he cheated again let it go so he could be there for the birth of his son we both knew it wasn't gonna last and my son was almost two months I made him get out of my house because he was messing around with one of his coworkers & I grew up with an broken family I didn't want my son to go through that pain I had to deal with so we talk things out got back together for a week and he cheated again during that week.. he said he wasn't going to be with another girl and focus on himself which was a lie because I saw him with another girl which was the one he cheated with the last three times.. he's treating me like complete shit giving me no respect when he talks to me and is ignoring my txts about my son because "she doesnt want him talking to me." Ill always love him because he is the father to my son & blessed me with the biggest blessing ever but

I just want to move on and I know he's toxic to me it's gonna be hard since I have to see him when he picks up my our son..

any advice to help me move on?