It's already easy for them to feel like there's something wrong with them, like they have a flaw in the very foundation of their character that they can't change.
But there is a special kind of challenge involved when it comes to dating someone with anxiety.
When an anxiety spell is coming on, there is no reason to siphon; there is no way to calm down until you just do calm down.
There isn't rhyme or reason involved in an anxiety disorder.
When a panic attack comes on, no amount of saying, “Everything is okay” or “Calm down” is going to make it stop.
If you can embrace this part of his or her personality as a quirk, you'll be better off.