Giving up is not an option in life, as much as at times I have thought about it. You have an incurable disease that will constantly be a battle, but you are soldiering on and fighting. That's all you can really do. It's hard to find the motivation at times, I understand that completely, but there is no other option available.
Hang in there, and keep up the fight. It's not exactly living the dream, but it's still living!