HELP ME

About over a month ago i met a guy and we clicked straight away , a week later the guy said he likes me , but isn't ready to take things to the next level . We agreed to take things slow " emotionally " and see where things go . Anyways about two weeks after meeting each other w decided to travel together to attend a concert , we traveled and enjoyed it very much but ended up sleeping in the same bed and kissing . But thats as far as it went . Anyways the point of me writing is that this guy has changed and i feel he has pulled away 100% after that small vacation !!!! Since we got back he hasn't been the same ! I feel like he's pulling away ! What should i do?