Boyfriend baby mama coming to look for me ...

I have known him for a year +. He has constantly been trying to talk to me and I never gave him the time a day, we talked on and off though. Past month we have been hanging out, spending time together, I met all his sisters and cousin(all the family he has here). Well he recently just had a baby, about a month ago. We were talking while she was pregnant but he was helping me through a break up and he was going through getting out of the constant miserable cycle of being with her. It started when she was bleeding back and she up and left and didn’t tell him she was going to the hospital. He was always stressed. I saw it way before. Well he confessed his feelings and I told him to try to work it out with the mother of his child. He said no, but when the baby came, he said the feelings came back we stopped talking completely. We worked together also. I told him Happy Father’s Day and he was like we need to talk... after work I went over there and he just broke down saying how he made a mistake, how he only thought about me, how he was just so miserable, how I made him happy, how I had every quality he needed, and his really seemed so sincere. I really do love him, it might be soon but we saw each other EVERYDAY. And he said it first, and he still says it to me, he said he would prove himself because he knows I’ll be on edge. He’s done everything I’ve wanted in a man! I accepted his baggage and was fine with it! But now the baby Mama is pouring her heart out asking for him back. When she cheated on him while pregnant and all. Saying she wants to talk to me to tell me to stop liking him, well I did, we broke it off completely! It was a mutual agreement. I felt bad for her honestly, and I was always on her side saying, “don’t disregard her feelings that’s the mother of your child, just because you moved on doesn’t mean she has so be kind” but no she’s coming to my job, where she has never been since she got fired, she’s came up there twice in two days. He said she keeps coming to his job, all day, and I had a feeling about that today and the he told me she did. I don’t know what to do. I would never disrespect her, EVER, when it comes to her or her child.