My takeaway is that you guys were having a good time and he wanted to go on a trip etc as you said, but then you said you didn’t want a relationship, which is maybe why he’s pulling away, or doesn’t want to wait for it in the future as you said. He could be feeling used as well. I agree with what aurielle said above. Just my impression of this post but of course nike of us on the forum know. If this recent treatment/vibe from him is bothering you you should definitely communicate it, otherwise nothing will change.