Relationship struggles.

Courtney
I need to know.. Has anyone else dealt with trust issues (from your SO) in your relationship? My boyfriend's past girlfriends have cheated on him. (Not all of them, but his two most serious relationships). And he's constantly second guessing me. Now, I'VE never lied or cheated on him, or given him any reason not to trust ME and I don't think it should be my job or my responsibility to make up for what his past girlfriends have done. My mom thinks this probably isn't something that will get better.. Any opinions or insight?