Liz...I am going to go out on another limb, here....(well, a small branch)....
It pains me to hear you (or anyone else)...predict that they will never be able to overcome something....
We live to what we "believe" about ourselves. We listen to the "self talk" that we tell ourselves. Thing is, that we tell ourselves these things so often (usually from early childhood" that we do it on such automatic pilot that we are not even aware of it.....
Self talk is a powerful, powerful force, and we all do it...we say either self affirming or self depreciating things...every day...all the time.
If you want to be free....stop telling yourself that you won't.....
Don't sabotage yourself......