A lesson I wish I'd learned sooner is to always reach out to people whenever you think about them. I used to worry I'd just be annoying, but I think it's a critical part of staying connected with people. And if they find it annoying then there probably wasn't much of a friendship anyway.

It can feel sad to always have to be the one initiating communication though. And to always feel like you have to hold back because you're being too much.