Not sure what to do in this situation...?

I'm 18, a senior in high school. I have a professor who just got out of college. I kind of have a crush on him. The other day he saw me crying and he came over and asked if I was okay. I told him no because my parents were getting a divorce and they weren't going to be able to pay for my college. He hugged me and held me for a little while and said he was sure everything was going to be okay. Friday, softball practice was cancelled and my friend was picking me up from school around seven. I was walking around school and I saw that my teacher was still there so I went to his classroom and started talking to him. I was wearing short shorts, a cami, and a really see through, loose sweater. We starts talking a little bit about school then he asked what I was doing at school because a girl as hot as me should be with her boyfriend. I told him I didn't have a boyfriend and he smiled. Then my friend called and said she wasn't going to be able to pick me up. My teacher offerred to take me home as long as we could stop at his apartment on they way home. I said sure and a little bit after that we left. When we got to his apartment, he changed into some other clothes and I was watching tv. When he finished what he was doing he came out and asked if I was ready. I told him his house was so peaceful compared to mine with all the fighting and yelling. He saidvi could stay for awhile and he sat down next to me. We watched tv and flirted a lot. Then he grabbed for the remote and grabbed my crotch instead. I let out a little moan and he turned red. I smiled and said I think he meant to do that. Then I climbed on top of him and we started making out. I massaged his area and he massaged my boobs. Pretty soon we were naked and we fell asleep. Nothing happened but now he offerred to let me stay at his house and he would pay for some of my college. We would be staying in the same bed and after what happened Friday night I'm sure we would have sex. What should I do?