"Am I wrong for wanting sex to make me feel good? "

I don`t think it matters, for now, if its right or wrong. What matter is :

Do you believe this to be true? Do you think that if she has sex you will feefl good?

Ask yourself seriously: - Do i feel not appreciated? is it only the sex?
- Do i feel good?

I guess there true answer for you will get our in your mind easy and fast.

Iif so , have you ever discussed it together?
Did she tell you directly " I never want to have sex with you?"

If you haven` done it yet, i think you shoud. If your relationship is really warm andloving, you don`t have t ovoid talking about certain subjects with her - especially your relaitonship.