Hi there, I have the same problem. I am half Italiano and have really dark hairs. I bleach them, and bleaching not only makes them lighter in colour (blonde) but they also appear much finer!! Have been doing it for over 13 years now.
The one I use is from boots the chemist. You will find it near the waxing/shaving stuff, and it last about 5 weeks. Its totally painless and takes only 10 mins to do. It doesn't bleach your skin, and within minutes you can enjoy feeling like you havn't even got a tash at all. You can just forget about it.
I love the effect sooo much I use it on my entire arms, and upper legs!!
Please let me know how you get on. Best of luck in finding what's right for you...