I feel like this too sometimes. I'm feeling it now especially since I discovered a wonderful med and the cacophony in my head has quieted down a lot.

The only thing that doesn't keep me from feeling really guilty is remembering that my therapist is not seeing me under duress. And she's assertive enough to tell me if she thought I was just being a big whiny baby.

And also, I remind myself that I'm NOT a whiny baby. I don't complain and cry about every little thing. Just the stuff that would drive anyone crazy, if they were in my shoes.

So just try to remember these things for yourself. Also, you should be proud that you aren't taking what you have for granted. That's a much worse trap to fall in, in my opinion.