Hello guys, its my first time posting here , im sure we ar

Hello guys,
its my first time posting here , im sure we are all here for a reason. Lately ive been feeling very insecure in my relationship which started alot of arguments and problems between my boyfriend and i. We have different profession lives hes a coach and im an engineer so our interaction with people is different,Im very fit so i shouldnt be insecure from that part and i do crossfit at the same box but still the feelings has changed . now whenever i hear or see him joke or talk to girls it annoys me. Hes a great guy that would do anything for me and would do anything to fix our problems . so at the end i think the problem is with me not him lately ive been looking only at the negative things and the insecurity is just controlling me and my feelings. Any suggestions on how to overcome this because im afraid this guy will stop fighting for me one day :(

What prompted these feelings in the first place, it seems like he is saying, WOW, you are amazing, and you going, no not really...