Well let be start with a big Grandpa hug for you.....the feelings you now have are hard to carry.
The best way to help you is to ask you to forget the whole thing.....take it as a flirt and nothing more.
Use it for good memories...or if they hurt to much....try to not think on them....go on with your life....don't build sand castle.
It's a known phenomenon that many get a crush on another partner on the net.....there are a lot of "flirting going around" after all they sit safe in their own room...nothing to fear....they live out their fantasies....and don't give a second thought to how they damage the other part who don't take this as a fantasy.
Now he might have felt it started to burn...and then the best way was to withdrawn.... he is yellow
So another big Hug from me....and cheer up I am sure there are some other that is set for you
