Is he cheating or just using her as a security blanket?

Well, I'll try to keep this as simple as possible! Im experiencing some serious heartache. I just found out my boyfriend is staying with his child's mother. We are definitely experiencing one of God's trials and tribulations I thought until this happenned. I suddenly was forced to vacate my residence. My landlord had sold his house and I only had such short notice to find a place. In the meantime I was suppose to stay move in with him but then he lost his job and could no longer keep his place. So he told me he was staying with his friend until we can work out our things to get a place. Then all of a suddent I get a call from his son's mother questioning me if I was still with him because he lives with her now. What the hell am I suppose to think. Do you think he's trying to play me out or just using her as a security blanket until I get my new residence situated? He would tell me all the time how much he hates her and wishes he never had a child with her. WTF is that all about?