Update: He continued to tell me my feeling weren't valid today and I pressed him further on the issue with V. He told me nothing was going on and I told him that I sent her a message asking if he had been flirting with her or anything like that. He broke down and admitted to it, also told me that I deserved it because he hasnt loved me for a long time. He's been asking her for nudes and flirting with her this entire time. She messaged me back and said the same thing in which I told her that we were broken up now so, she could have him. She states that she didn't know that we were in a relationship and that he never told her that he had a kid. I'm getting in contact with a realtor to sell the property and once there's a contract that states the money with be evenly split, I'm leaving. Everything in our house and our house itself was bought using my grandpa's inheritance money, but there's nothing I can do about that now. Words cannot begin to describe how exhausted I am and I'm lost on how to even proceed with this.