i have this friend who i've known since HS and we were really close. but lately (like last several months), we've kinda just drifted apart. when we talk it feels kinda forced now, and i find that we're often grasping for topics to talk about. even hanging out or finding something to do has become a chore it seems. it's weird, because when we first started to get to know each other well, we used to be able to talk for hours on end and even when we did "nothing" together it was fun. now i'm kinda left wondering if we've somehow taken our friendship as far as it can go. there just seems to be a lot of apathy on both ends and i'm wondering if i should make an effort to try to revive the friendship or let it unfold naturally, for better or worse. i've had plenty of friends come and go thru my life, but i've never had a really close friendship like this one just inexplicably dissipate, so i'm kinda wondering what to do. anyone else have any experience with this?