What Would You do? What Do You Think?

So I been with my boyfriend almost three yaers he has 4 kids before we met by two different baby mothers. his first baby mom I am fine with I have no problem with, his second one neither I have never met neithr one of them and really don't care to ever meet them. He moved from one city to be with me out here in texas. He go back home due to court issues and what not. So he went back to his hometown for cour,t came back home maybe a day he came back I get a email from his second baby mother saying they slept together granted he never even told me he even went seen her. She describe his clothes the rental car he was in the shoes he had on about his job he was fired from how we were living. He denies everything, he says she get information from someone who he and she is close to by the name of teedy. Which I do not believe for the simple fact he never even went by teedy for her to know what he had on or the color and kind of car he was in. So That excuse was the girl must hae did a drive by, by his mother house and seen him outside to be able to describe the car and clothes. Now Tell me Who would believe what he has said or tell me what would u do. If you feel The person you are with do not want to be with you. should a person stay and try to work it out? But You know it will be always on your mind. Are Should I move on. Tell me what do you think? What would You do?