What would you do?

đź’–Genesisđź’–

Hi everyone. Sorry to bother but I really don't have a lot of people to talk to and I just thought writing it down would help.

Yesterday I looked in my phone and my husband had a private Internet page on I saw he was writing to his ex girlfriend. He was telling her he missed her and when could they go out and that she could visit him when he was home alone. I confronted him and said that was the worst mistake of his life and that he was sorry.

My whole family is telling me to leave him because he will do it again and I just found out that his mom still talks to her and buys her stuff since the ex sells Mary kay.

What should I do? What would you do in my position?