Too that speical person

I always blow up on my boyfriend. I hate when he looks at other girls in that way. He knows it makes me very very mad. but he does it anyways, he tells me he won't then he does.. How I did handle it was yelling at him and breaking up with him all the time. Now how i handle things is well how you would say " Don't sweat the small stuff " is just not caring as much. I know guys will be guys and do those things girls also, but the thing was that I wasn't getting that he is mine and hes not running off with them. Its natural for humans too looks at the oppoisite sex. All i asked of him was not too do it in front of me and low and behold he hasn't.