How should I respond?

I’m 17 and my family is very conservative. I’ve always known that I’m not allowed to date, but before now I didn’t care too much because I’d never had anyone interested in me. I met up hung out with a very nice guy a couple of weeks ago. We share interests as well as political and religious views. We sat and talked about anything and everything for 2 hours the first time we met. Later he asked me out. I sat down and talked to my Dad about it that night, because I knew that if I went behind their back and they found out they’d have my head on a silver platter. He was ok with the idea but said it needed to be in a group context and not after dark. I was conflicted between trying to respect his rules and going on a date behind his back. I ending up going on a date with this guy. I’d never gone on a date before for very obvious reasons. It was everything I ever wanted in a first date and then some. We talked for 4 hours!

My hope was that if we kept dating I could slowly introduce my parents to the idea and we wouldn’t have to go out behind their back. It didn’t make any sense to me to try to get my parents to let me go on a first date, because it’s only a first date. It could be that one or both of is wasn’t even interested in seeing eachother again.

So he did ask my out again, and we have something scheduled for tomorrow evening.

The problem is, that apparently my Dad never told my Mom about the conversation the we had. I told her what happened (aside from the fact that we went on a date, obviously). She ended up telling me how disappointed she is in me, etc. I won’t bother to relate what she said. Just know she was pretty darn upset. Apparently she’s now going to keep me on a very short leash. I’m not really allowed to go anywhere now, except when I’m scheduled to be at school. (Not to mention the fact that I’m actually going to University….)

I’m obviously going to have to cancel tomorrow because I have to come home right after school now. (What I told her is that I was going to stay at school and study for awhile.)

While it is sad that I could be losing I potential relationship with a great guy, the biggest issue for me is knowing how to respond to me parents about this.
As great as he really does seem, most teen relationships don’t last, and I recognise that. Nevertheless, I don’t know how to emotionally deal with my parents’ attitude towards guys.
How do I accept this?

Being disappointed and angry with me for hanging out with a guy without permission and talking for a couple hours (not even a date mind you) doesn’t make sense to me. Is there something I’m missing here?