When you tell her make sure you convey the message that it does not bother you or lower your value.
I have bad memory! Seriously bad memory and I have a stuttering problem that I kinda neutralised after a few sessions of speech therapy when I was 8 but it's still there.
I told my girl about my lil problems and to my surprise she didn't notice the stuttering at all because of the way I diminish it
. Yes, it's there and will probably be there for the rest of my life but the more I don't let it bother me the more other people will ignore it and some won't notice it at all.
It was a bit hard to let her not notice my crappy memory though. Let's just say if it wasn't for Facebook I wouldn't know when her birthday was.