Im 16... Hes 32

Im 16 hes 32 we met because i used to work as a babysitter for his brother and we fell in love he wants to be with me physically(as in having sex) but i dont know if im ready yet. My parents know him but dont know we are in a relationship. If they found out theyd freak! But i love him and i know we will get married once im 18. I want to make love but i know that he could go to jail... What should i do?

Update: I broke it off with him. It wasnt easy but after reading you guys' comments i knew it was the right thing to do. But he has been calling my phone, leaving very aggressive voicemails. I have NEVER seen this side of him before. Im glad i never had sex with him because he isnt the man i thought he was. Its becoming scary. I dont know what i did to make him "hate me". He wants to talk about it alone. Whenever we were alone things would get hot and heavybut never all the way i dont know if i can stand being along in a room with him, i just dont feel safe anymore like i used to when we were alone. I miss him so much but i know now that i was being naïve to think we could be together.