I don't want to be rude, but...

Me and my boyfriend just moved in. I have a 1 year old fulltime and he has a 2 year old part time. We transitioned my daughter into her crib. His daughter sleeps in our bed, and it's really starting to make me feel frustrated. I feel like the intimacy isn't there anymore, I'm getting slept on by a larger child than my own at night when she rolls over. I like sleeping so i can spread out. remind you, we are on a futon. Thats like a full size bed and my boyfriend tosses and turns as it is and i dont know what to say without feeling like an asshole. I love this girl, i just dont want to share my bed. Helppp