He fears his girl will leave him if someone else with better career n handsome face proposes her...He constantly compares his own appearance with others. He have no trust in the girl he claims to love. :)
insecurities why this thing s arise after involve in a relationship?why he/she didn't think about it in first place?
+2 answers in: “If someone's love for you becomes his/her insecurity what will you do?”