people are cruel

My boyfriend and his family are literally just using me and faking caring for me till the baby is born. I read his messages between him and his mom and she says "you just have to be with her till he's born and we're there for the birth"  he said the biggest reason he's even with me is so he don't miss out on his sons birth. I'm so livid after the messages I just want to leave and no one know when my baby is born. I've never felt so used and mistreated in my life. I'm so heartbroken and I have no where to go. I'm about to be a single mom of two kids (my daughter isn't his). I have no job right now he's been supporting me and my daughter because this pregnancy has been so hard. I beg him to love me everyday and this I what i get.