Emily, bless your heart. I went through this with my son, but it started when I was 10 and my mother hated cats and told everyone she was allergic. She had ME convinced that I was allergic too, plus I never really liked them. They DID give me problems. I've always had dogs - we had a Lassie collie at the time - about 3 months old. When my son was 3 and my daughter 2, a kitten wandered up to our babysitter's house. She wasn't going to feed it or anything. It was SO thin and pitiful. I got some food and put the cat in the garage while we went to church. I told the kids I would take her to the humane society the next day. Well, long story short - (my son was NEVER a morning person - more like a monster in the mornings - I'd have to get up 2 hours early to wake him up slowly and peacefully if I wanted him to cooperate at all! The next morning, I went into his room and the minute I touched him, he sat up, rubbed his eys and said, "Where's my kitty." He was the happiest little boy you've ever seen. I decided right then and there that she could stay.......BUT, I had a LONG talk with her and told her that if she was going to live in our house, there would be no scratching on the furniture, no sitting on the tables and counters, etc.... Well, we had our trials and we both compromised.
When my son turned 4, he developed a really bad case of asthma. My mother's first words were 'get rid of all those animals - especially the cat!' I told the kids we would have to find a home for Amber (calico with yellow eyes). Mark was sick and got sicker - he cried constantly, not wailing, but sobbing sometimes. It was more than I could handle. I asked the doctor about it. He said since Mark DID have other allergies besides cat dander, there were things I could do to minimize the problems (most of the things mentioned in your answers here). One thing I didn't see mentioned was to always wash his hair - every night - and change his pillow case daily and not let the cat sleep with him. Well, Mark would sneak her into his bed. But the doctor DID tell me that - in his experience - the more we are around things we're allergic to, we build up an immunity to them. He encouraged me to make her an inside-only cat, which I did. Within a month, the wheezing was gone. He would have a flare-up in the spring and fall, but doctor said that was mostly pollen and mountain cedar. He said keeping the cat inside was the biggest deterent - as cats roam outside, they gather dander, dust, pollen, dirt - all manner of allergens and bring them inside with them. I DID wipe the cat off with a damp rag every night before they went to bed. In fact, Mark took over that chore....and she let him. (I had to fight her, but she would sit still for him). While over the next several years, he continued to have seasonal allergies, he outgrew his asthma when he was about 12 and has cats today (he's 41) and they don't bother him.
Long story, sorry - if you guys are attached to your felines, there are other ways. This might sound awful coming from a mother, but through this and other things, my children have grown up with a tenderness and sensitivy for all living creatures. Now that they are grown, they have both thanked me several times for seeking remedies other than 'get rid of it' and how much they loved having pets while they were growing up.
I have a 15-year-old granddaughter who also had asthma (from the time she was about 3). The SIL insisted they get rid of their 2 cats, so my daughter conceded. But after Emily got worse even on 5 different meds, they decided to try all the things I did and they're all much happier now - and Emily is not on all the meds anymore, runs track, is in marching band, plays sports .... she has seasonal problems like my son when he was little. But she'd never consider getting rid of her pets.
Good luck! Keep us posted!
C.