How hard would it be to build this feature?

I go into an npub's profile and there's an option "see friendship" sort of feature, like on Facebook... Where I can see a history of my conversations and mutual engagements with that specific npub. 

Something I could use to in the case I am dealing with right now where I really want to go back to a conversation I was having with nostr:nprofile1qqsdgvut0sesvjgulh65j9x3554cp2t9dp0hxcf3r6h9704078fr5kcprpmhxue69uhkummnv3exjan99eshqup0wfjkcctemgrnlp a couple weeks back who shared some tools and resources answering my questions on a note I'd shared about the tech issues I am experiencing with figuring out how to stream on zap stream. 

I didn't have a chance to jump on implementing right away and forgot to bookmark the note and now it is covered by a pile of 2 weeks of other notes. It's not something I am able to search for it appears easily or at all. 

And I am really dreaming of this feature that allows me to go back to notes I interacted with specific people somehow more easily, like memories.   🤔

#asknostr #grownostr