Fiancé talking to other women..

Last night I found some things in my finances phone. They were text from other women.. I confronted him and He has been texting them and asking them to do things for him. One of them lives in my hometown,  he slept with her before we were together. He told me he would stop Bc he didnt want to lose me that he can't live without me 🙄, and he didn't mean anything by it that he just got bored at work. I know that's not an excuse by any means, but I'm almost 4 months pregnant and idk what to do. I feel like it's a game of tug of war inside me. I'm hurt and upset. Should I leave, or give him another chance??