Send him photos of moments you'd like to remember. He will send them back to you once in a while. He will also remind you on the events' yearly anniversaries. Science says this can help you reduce stress and have a better mood: https://bit.ly/2WzqEBQ.
MemrooBot
Petsnflats
This is a great way to be reminded of nice memories from time to time. It can cheer you up especially when you're having a hard day
Pros:Let's you pick the memories that can make you happy in the future
Cons:Only available for telegram so far
Anything that makes moments meaningful and memorable is appreciated. Thanks!
Pros:Great idea! We all need more beautiful moments in our lives. Remembering is almost as good as experiencing them.
Cons:Some people might want to schedule themselves - or to have the option