finacés babymama lives with us?

Kourtnie • 18 years old 👑 expecting my 1st in October 2017 🤰💕
This is a long story. 
My finacés babymama and I have become really good friends, talking everyday. Some stuff went down with who she was living with, so me and my SO decided it would be best if her and her two kids (1 his) come stay with us for a while. This is where it gets tricky. Me and him have been constantly arguing for almost 3 months. Well, he told me that we needed to take a break. He didn't want to break up, he didn't want to stop seeing me, but he wanted to live separately for a while. Well in the mean time of me living somewhere else, his babymama is still living there. Him and I are talking & trying to work things out. He still tells me he loves me, that he wants no one else but me, but we just need time. 
I need opinions & support to help me get through this. Please don't be mean, I've had enough of that.