Time has no bearing on friendship for me, we can have gaps for years and still pick up where we left off. There are only a couple things that can kill a friendship for me.

Them directly saying they don’t want to be friends or don’t like hanging out with me. Happened once or maybe twice, and it was for the best.

I find out they are a terrible person. Lost a few to maga or internet manly man bullshit.

I try not to overthink friendships because people are complicated and the most important thing is getting together sometimes and being supportive of each other.