I think what you are looking for is a CRM. There are tons to pick from but one example is Krayin CRM

Alternative post, it's sad that I have to remember when to keep up with people since most people I know don't reach out at all!

Nametag was one I have been contemplating

https://nametag.one/

Monica and Meercat CRM are decent options.

I just started out testing Monica. The setup using docker was straightforward and so far I like it.

If you're okay with something lightweight (android app, no server, no syncing, just your contacts + regular reminders), then Tend is nice.

https://codeberg.org/jksalcedo/tend

Would love something like that.. Better if I can put a reminder to check on them again and maybe add some notes of previous conversations