When you say it hurts, you mean the cervix only hurts when you touch it, or it hurts to put a finger in in general because of tightness?
If it is hurting because of tightness that will go over time. The first time you have sex it will hurt like hell (I can't lie to you, you seem like a nice person). Eventually it will stop hurting. Promise!
From what I've heard from my girl friends, Song Breeze is right; if you want to be prepared, maybe you should try some penetrating stimulation, at least to make it more comfortable for later. I could never guarantee that it'll feel good at first, but it would be nice to know it will feel good, instead of hurting yourself when you get some action ;P. Of course, be careful about breaking your hymen if you try to do penetration masturbation. And above all else, good luck, and don't waste it
Are you talking about your cervix or your vagina? The cervix is a harder feeling opening deep in your vagina and is the end of your womb. The vagina should only hurt if you still have your hymen (the skin covering all or some of the vagina for some females until you have intercourse and it is broken). Most active females lose their hymens well before they have intercourse.
Perhaps you have to get a bit relaxed, try to look at a good film, start with a good soft porn when you're alone at home, try to relax undress yourself and start to touch yourself. You have to start masturbing yourself start to please yourself and find pleasure in it. If you start the work with it yourself regularly and with time, you'll be able to have that pleasure with a man.
I would suggest getting a small vibrator, lube it up and go slowly. The vibrations will stimulate and relax your vag, and the lube should make it more comfortable.