Sounds like you need to just build a bridge and get over him.
Hell, my ex girlfriend from 10+ years ago just tried to chat me up not too long ago and be friendly. I just responded with, "What do you want from me?" and she went away.
I'm sorry. You need to respect his wishes if he doesn't want to be friends with you.
"Well, then," the Cat went on, "you see a dog growls when it's angry, and wags its tail when it's pleased. Now I growl when I'm pleased, and wag my tail when I'm angry. Therefore I'm mad."