Y.D.
I know how you feel i was with my kids father for 6 years and then i found him with a close friend if mine, shortly after that he got a married women pregnant. I hated him then and I still do, but you have to put your difference aside and let him be a father. at least he is there for his baby. oh and trust me f@#* the girl friend she will never be a mom to your baby, your her mother.