" it turned out to be way too complicated and annoying and not worth it"
That's dating chicks all over. I gave it up for Lent.

"I came over to your page to say hi but it seems I've been defriended"
"Sorry, I was just cleaning up and felt we drifted apart after you found someone. I didn't want to complicate anything with your potential girlfriend. I hadn't heard from you in a while and figured you might feel the same."