Okay I usually don't go online to ask questions but I need some help. I am here mostly for my fiancee and some what myself.
Alright here I go.

My fiancee has Dissociative Idenetity disorder and I found out about it about two years ago. It was a total surprise to me when it happened but I've had one other experience with this before and I recognized it right away, it also helped to ask his mom about it, and she clearified it for me. I wasn't mad or anything it was actually a pleasant surprise. For me not for him, he was actually freaked out by it which is understandable cause he thought I was going to leave him but I didn't.

Sorry I thought some history was required.

Two years later I finally know some alters and they're nice to me but I'm not sure how to react to one who said that he loved me. Course I love them but not in a romantic way more of you guys are the best friends I could ever have way. I kind of figured out what this one alters purpose is which is to protect my fiancee and keep him alive, healthy, and emotionally happy at any cost. Well most of the time anyway.

Would it be okay for me to try to explain to this alter that I love him in a nonromantic way or would it be okay to love him cause he is a part of my fiancee? I'm so confused about this.

Also too could I please have some tips for my fiancee, he's trying to journal in order to communicate with his alters but he doesn't know where or how to start.
I love my fiancee so much