<human>: Can you condense the text into three sentences or less?

My girlfriend and I have been together for 3 years. Sometime around 8 months into our relationship she began to get chronic migraines. Basically she woke up one day with a migraine and it did not go away for many months. She has been to many doctors and tried many medications. Since this started she has gone through many mood changes that have affected our relationship. She was put on an anti-depressant for many months to dull the pain, then she stopped taking it. She also stopped taking birth control because she thought it was a hormone issue. 

All of these medication changes made her irritable, lazy, depressed and lethargic. I have always been there to take care of her, I would give her massages, fetch her things, and do housework. During this time I did not have much of a life except for taking care of my sick gf.

Sometime around last year she got off of all of her medications and began to feel better. She was not getting daily migraines anymore and we began to be more active in our life. Everything was looking up and we began to talk seriously about marriage. Her good health lasted for almost a year. Then about a month ago she started getting daily headaches again. Thus, my predicament.

Early on in our relationship I was okay with taking care of her constantly. She is very needy when she is sick and has to have me around all of the time. Now I find myself getting annoyed when she whines about her headaches and asks me to do something for her. I know it is not her fault that she is sick, and I know it must be very painful and depressing. I worry constantly that the rest of our life is going to be like this. We have tried almost every kind of treatment and nothing helps. I love her, I don't want to abandon her, but I find myself questioning our life together. The other day we were talking about marriage, and she said "I need you to take care of me, are you sure you can do that?" and it really scared me.
<bot>: GF has chronic health issues (headaches), I am her caretaker. I find myself becoming resentful while marriage looms.