Should I cut all communtication with my exboyfriend?

In August while on vacation I decided to go through my exboyfriends phone because I had a feeling something wasn’t right. When I went through his phone I found text messages between him and two other girls. One message was from a year a ago and the other recent. He sent the one from a year ago pictures of his penis and the more recent one, she was asking her to have sex with him. I confronted him about it and he was crying and begged me not to leave him so I decided to work through things and try to rebuild trust and his father told me that he can be a better man. Now three weeks ago, I had that same feeling so I went through his phone again. This time I saw a screenshot of text messages between him and another female he sent to his brother. I confronted him about it and he cried and said he’s sorry. This time his stepfather talk to me about his actions. My Ex told me that he will stop and still tells me he loves me. My heart is broken and I honestly don’t know what to do. Two years ago I found out I was pregnant and we both decided we are not financially stable to have a baby so I got an abortion. I have been struggle emotionally after getting an abortion. He’s telling me he will change but I’m just not trying to get hurt again. He has been there for me and we went through a lot together. I struggle with letting people go. Does anyone have any advice they could give me?