Not cold as in temperature 
DP and I usually have a great, caring and loving relationship, have lots of fun and laughter, lovely family time (I have two DC that aren't his but he treats them like his own). However, for about four/five days every month (or sometimes it goes two months before this happens again) he acts completely opposite to me. Won't tell me he loves me when I say I love you, won't let me touch him, hold his hand or cuddle up to him in bed or kiss, will sit as far away as possible from me on the couch(when it's just the two of us), won't talk to me or respond when I ask him questions, is in a mood etc. He acts normal in front of the kids, it's when they're not there/in bed etc. If I ask him what's wrong, he says nothing and gets annoyed if I try and push it and just shuts the conversation down. I don't know what to make of it, I never see it coming either, it started a few days ago after a normal day, in the evening he just acted like that when I came back in the room. Does anyone else's DP do this or has anyone experienced it? For full context, he has had depression in the past. Any advice or experience would be very much appreciated.