How can I possibly...

Jeana • My boyfriend and I have lost babies and we really want to have one together. We have had three miscarriages and have lost four babies. We were pregnant with twins. Maybe this will help us.
My boyfriend has two kids with a previous relationship and they aren't really his... He is trying to get custody of the two and well I honestly don't need the added stress of raising kids that aren't really his or mine. Their mom lost her temper and now he's wanting to go get them permanently. I had already taken care of them before for a year and three months when she made a ton of mistakes. Should I feel bad for being mad and wanting to give up? We lost four babies and I feel like I always take the backseat, I don't feel he respects my wishes or cares that I want kids that he actually fathered. I feel lost, alone and I feel like giving up on us. I'm on AF and feeling really hormonal, I feel alone.