>Can you meet him/her regularly, see him/her conversing with other people and not being jealous or anything of this kind of feelings? Say, you still want to communicate and be friendly and need to supress and control yourself every day?

Jealousy is not what you want to feed in that situation. Like native americans say... feed the dog you want to grow... if jealousy is popping up you are providing emotional feeding to the wrong dog...