OP, great sympathy for you, and thanks for nothing to all those posters who crowd on here to tell you to grow up. I am phobic too, and it has had a serious impact on my life. There are large tracts of the world I won't travel to (including Australia, where my db lives). I spend every autumn frozen with fear. I have - and this is really not great - stayed in poor relationships so that I could have someone to deal with spiders.
I'm not proud of any of this. I would love to be a better role model for my kids. I would love to be able to live independently. It does NOT help for people to say, "I find it all a bit girlie".
Now, a few years ago I did the Friendly Spider course and I thought it was amazingly good. But I was really unlucky - the highlight of the day is the hypnosis, where you all lie down in a darkened room. Just as the guy had got started, I felt a tickle on my arm - yes, a spider! Only a small one, but still I had to be carted out quickly (can you imagine if I had screamed, "Spider!" in a dark room full of 60 arachnophobes - people would have died in the rush). BUT I did still manage to hold both a tarantula and a house spider at the end of the day (the house spider was much worse - more scuttle).
What I didn't do - and it was my fault - was to follow their instruction to practise removing a few spiders within the month following the course. They don't aim to make you love spiders, just to make you calm enough to be able to remove them. So you have to prove to yourself you can do it by making yourself do it, or you lose the effect. I am better with spiders than I was before the course - less distressed and panicky - but not better enough yet.
However, this thread has made me decide that I truly don't want to live like this anymore, and I've just signed up to redo the Friendly Spider course. This time I'm going to do it in August, just before spider season, so that I can get practice straight after. So huge sympathies for you right now, but thanks because you've spurred me into action 