Hes 3 years older than I am?

Okay, heres the story. I spent the night at this guys house with ym friend becuase we didnt have a place to sleep that night. My friend and I were on the bed and he was on the floor. He wrote me on his ipod asking me to come lay on the floor with him. We ahd been flirting all night and my friend was asleep next to me a tthis point. I moved down to the floor and he immediatly wrapped his arms around me. We cuddled and we asked each other questions adn talked for an hour or 2. We talked about everything from kissing, best kisses, , etc. I turned around to face him and wwe kissed. It go heated from there. We kissed more and more and french kissed and he got on top of me. He rubbed my back, hips, , leg and moved his hand towards my crotch and up my shirt a little. When he was on top of me, and we were kissing, he started moving his hand by my crotch and I asked him to stop because I didnt want to. He said he wnt going to do anyhting I wasnt ready for so he stopped and we continued kissing. I dont know what to do, and where we go from here. We were up tol 6 a.m. and I went on the floor around 2 or 3 a.m. Hes 19 and im 16 and I dont know if it was jsut a one night thing. He said he didnt want it to be just a one night thing but, I dont know. It was a great night and I dont regret anything. Help?!?!