Rejection issues possible bipolar

Has anyone ever tried to date someone who rejected them at first but now you are with? Any negative feelings? My boyfriend and I have only been dating ten months, he's the first guy in three years I told I loved, we have no other issues but have been arguing about this for three months now. He feels insecure bc of the guys I dated after I turned him down. I've tol him it just took time to get to know him which is true and don't see why he is still held up. We did go to therapist they put him on anti anxiety and depression but he doesn't always take

Advice

reassure him ur all his. my bf used to always be jealous of the guys i dated. or our guy friends. but i always tell him hey, chill, i am all yours. no ones got anything on u. i give him the attention he needs and the time maybe the fact that he's jealous of who ever u dated after u rejected him comes from somewhere else in ur relationship which caused him to be depressed. everyones insecure sometimes, im insecure when i see my guy sitting with his really hot classmate. im not bad looking at all but still i get those insecurities sometimes. we're all human. but some people have them more than others always look for the source. where is this coming from? why is he feeling this way? maybe he's over weight, so try signing up to a gym, and go with him. motivate him maybe if he cuts his hair or grows his hair he looks better and stop feeling insecure. look for the source and solve it. if its about how he looks. then he can change it . solve it. if it was about his personality. let him go to counseling or something. after u know the source u will know how to solve this