former best friend growing distant. should i confront him about it?

r/

my (23m) best friend (23m) of the past 4 years has stopped talking and isn’t replying to my texts. we were roommates for 2 years and last month we moved to different places not very far apart. i feel like after the move he no longer views me as a close friend and recently whenever he’s free (he works a job which he sleeps at) he hasn’t been in touch when home and is hanging out with other friends. he may also be busy but i don’t get why he doesn’t just talk. i’m flying in 2 days to south america for a long trip and debating on confronting him about this or letting time do it’s thing.

tl;dr: do i confront friend about him ignoring me or just let this pass