I'm not going to get rid of my cat even though I'm badly allergic
Why are you putting yourself through such misery?
It's the only love I have to live for
That's so sad to hear!  I respect that you're being loyal to your pet, which is admirable.  But maybe you could give them to a close friend or neighbor?
I can't and I love my cat.
I get that, and I get that it is good to be loyal to your animals, but there has to be some relief for you. I would rehome the cat if I were you.