A broken home

Okay so my son's father and I were broken up for some months ago and he came back and wanted to work it out and he has a baby on the way with the girl he left me for I'm really hurt by it but it's nothing I can do about that..... but I kept asking him if he got feelings for her and he said he care for her as being the mother of his child and a couple of days ago he told me that he think we should just be friends because he be very " busy" and don't have time for me.... I'm hurt because I think he just wanna be a family with her .