Scared mama

So here I am pregnant and confused, I don't know what's going on with my baby daddy .... He's happy then sad then confused then trying to do or say things to hurt me, he'll chat with other girls who he says don't count cause they're computerized, he gets mad and says hurtful things to me then he says I degrade him so he's allowed to do it to me, idk why I'm here, why do girls stay when they know deep inside they're not wanted, I'm hope I can work this out for my baby, it's not bad being a single mom but I don't wanna do that for my baby, idk what's gonna happen but for now I guess I gotta deal with it,