Most Helpful Guy
Most Helpful Girl
That's a serious insecurity on his part. You need to talk to him about it and let him know that if he can't find a way to deal with it by himself and not let it affect you, that you may leave, because that behavior will seep into other aspects of life. If you talk to male coworkers, or if some dude at a store flirts with you. It can get out of hand and fast.