Helpless because of pain...

I am just 19 years old, a full time student, and I have Psoriatic Arthritis and Ankylosing Spondylitis. I had a lot of health problems growing up and right after i "grew out of" those I began having pain and swelling in my joints...at 16 I was told I was crazy, the pain was in my head cause I was searching for attention. I finally got a Dr to look into the symptoms last year, finally in January of this year they figured out what was wrong. Now I am trying to balance being a student with the pain, fatigue, and general side effects of the diseases and treatment. This spring my best friend, high school sweetheart, and the man of my dreams since second grade proposed. After 4 years together, and my health issues, we have learned a lot about overcoming obstacles and using them to grow closer together. However it feels like that is changing. Before treatment I had pain but it was manageable...after starting treatment (Remicade and Methotrexate) it has gotten out of control. I need help getting out of bed, getting dressed, opening my medicine bottles...I can't even bend over to shave my legs without help. I feel useless having to have people help me with this things, and knowing that it is him helping me somehow makes it worse. Instead of going out with his friends every weekend he stays home with me in case I need something, he works 11 hour days then comes home to make me food so I can take my meds...he edits my papers (which thanks to the pain killers normally are incoherent at best). He does everything for me and gets nothing in return because of my pain. He doesn't seem to mind taking care of me but he is a 21 year old guy with a lot of friends so I know he needs to have some nights being out with them. When I convince him to go out he has a blast and it shows...but at the same time whenever he does go out I think I resent him. He is able to be normal, he can go out and play pool or go to a club...things I can't. And I don't know how to not feel that way.....