!7 and 13 year old dating!?

i live in illinois, im 17 years old, i love my girlfriend shes 13 we've been dating for months now..but for her age she really wants to have ...She tells me stuff that turns her on, and i want to but at the same time i dont beacuse shes younger. shes the one that tells me all the time how bad she wants to and i dont know what to do. is it statutory if i have with her? i love her and she doesnt want to wait, i dont want to get my self in trouble or her in trouble, or pregnant at a young age. can i go to jail her parents prosecute me if i did? ilove her and iwant to spend time with her but everytime im with her she tries to and i dont know how to react. im turning 18 in march, and would it be illegal to date her when im 18? should i end the relationship for the best of us? help..