Get him interested again

The title might be a bit misleading but I am not mothertongue English and I can't think of a more appropriate one. I've been saying this guy for a year. It's a distance story but it's worked out well so far. At this point though, I'm clearly the one who's making more effort into this. For the first 6 months we could spend a whole night talking, now it feels like topics don't come as spontaneous as they used to. Messages have become a little less intriguing. Maybe I'm trying to hard? He says he's terrible at expressing feelings whilst I'm the opposite. In phone Calls he's the one at the end saying it's bed time etc. . After spending a whole week together, the last night he said he didn't touch me and specified that it's not that he has stopped liking me but that night he just needed his own space. what would you do if you were me? Thank you SO much