My boyfriend is stressed and questioning our relationship?

so about a year ago I started talking to a guy, I have. 6 year old daughter and we kept things pretty casual for a while after about 4 months we started dating officially - 6 months I introduced him to my daughter 8 months we ended up moving in together - wich yes all happened very quick. I expressed to him numerous times how complicated things can get when there's a kid involved now we find ourselves living together in the middle a a very ugly custody battle between me and my ex - we've been seeing each other for a year and he's freaking out. We've talked and basically he's stressed and scared he's never been in a relationship this long and he himself thinks he has commitment issues. He's pulling away and he has doubts about if we can actually make this work long term. He says even if we can't make it work in a relationship she still wants me and my daughter in his life and I don't know how to help him work through these feelings. I do honestly believe he cares about us and wants to be with us but I think the stress and his own fears are getting the better of him and he's pulling away. These are his own emotions and he's said himself nothing I've done has caused these feelings so there's nothing to "fix" persay - Id love to hear some advice on how I can support him through these feelings to give our relationship the best chance because this is an extremely stressful situation and I can totally understand these feelings and think they're totally normal
My boyfriend is stressed and questioning our relationship?
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