I need advice

I've been talking to this guy for months since he moved away to another city and like its been the best few months of my life and for him too apparently, like we've gotten to know each other soooo much, we've shared our best moments together ...but this past week he's become hella cold all of the sudden. No calls, short answer replies or maybe even none:( I'm so confused like what went wrong 😩 and it hurts so much cause he actually made me catch hella feelings for him and I usually don't catch feelings for someone till I'm certain they feel the same... I guess he turned  off  his feelings or something in a span of a week :(  he stopped right when things got serious.... I've tried to stop thinking bout him but I can't for my life, but what do u guys think is the smarter move... Should I try and move on or should I wait ?