Caught My husband cheating

I’m try make this short! A couple months ago I found my husband watch and checked his messages. I seen he was texting his manager. Telling her it’s nice seeing you smiling today at work. I asked him why are you talking to your manager like that do you like her or what. He said I didn’t say nothing bad I was just trying make her happy because she lost her husband. While a couple days later my son told me he went to the park and that his dad manager was there with her kids and she was with them playing. I didn’t go because I was sick pregnant. I told him why didn’t you tell me your manager went with you to the park he said she was already there when I got there. I was mad for a couple weeks about it. He was sleeping downstairs. We finally talked and told me you can talk to my manager and she will let you know we have nothing going on. We talked and she even said congratulations on your pregnancy. I than thought okay I’m over reacting. He got fire from his job he said because he wasn’t clocking out but than I was thinking why wouldn’t his manager change his times. I felt good that he wasn’t working with her anymore. This happen in New Mexico we just recently moved to North Carolina. Last night I seen his phone that he was snap chatting his manger from NM. These our the messages! Last night he told her good night babe the other messages were in sept and Oct. Idk how she can lie to my face and knowing his married with 2 kids and I’m currently pregnant. She is currently in NM and now we are in NC. He was in a rush to move here in NC. Now that I know this I’m planning on getting a divorce I haven’t told him anything about it but I will once I find a place to live. I’ll let him be free with his new girl. I know kids are going hurt that’s what hurts me the most! My son always tells me I want us to be a family. I can’t stop crying knowing his doing this to me but I need be strong for my kids!