i think nothing can beat the feeling when somebody says that they have been thinking of you or something reminded them of you. whether it’s a tv show I recommended, a flower I really like or just a random thing I mentioned to them years ago- i love it when a friend tells me that they were thinking of me and actually like me ( I guess I also really like the validation cause of my lack of emotions permanence) but yep kind words feel even better than any material gifts.
Check in on them, ask them how they‘ve been doing, let them know how you’ve been. It’s important, you never know what they could be going through, and they always appreciate it 💙