I've dated a few hearing people and have been at social gatherings with a few hearing people, but was never in a relationship with a hearing person. So, my answers to your questions will be from a general point of view as a person going out to dinner, seeing a movie, going to a party, etc... with a hearing person.
Question 1: what is your main means of communcating? does your significant other know sign? or do you lip read, or use a piece of paper?
Yes, most of them know sign language. I've dated a couple girls who were interpreting students. Those that weren't fluent in sign language, we spoke orally. I'm hard-of-hearing, so it wasn't a big problem. If I had trouble understanding one thing, I'd simply ask them to repeat.
Question 2: when your around your significant other's friends, do his/her friends treat you differntly?
It depends on where we are. Most of the time, the ones I dated that were interpreting students were friends with deaf people or other interpreting students. So, pretty much everyone signed in the conversation. There were a few instances where the hearing person would forget to sign or the other person didn't sign, but they never really looked at or treated me differently than before.
Question 3: is there really any differnce in dating a hearing person?
It depends on how things go. If it's a person who communicates well, then there's not much of a difference. If it's a person who gets frustrated easily, then yes.
Question 4: do you think the movie "children of a lesser god" is a good example of a hearing a deaf person dating?
I don't really know. The movie was made in the 80s and times have changed. We are increasing in mainstreamed schools and views on relationships have changed as well. So, it's hard to say if it's the same or not.
Question 5: does your significant other tend not to listen to music, because you cannot enjoy it with them? (this question comes from the movie children of a lesser god)
I don't really care. If she wants to listen to music, that's fine with me. It's her pleasure. There will be movies that she doesn't want to watch with me or video games she doesn't want to play with me. That's fine. I'll do those myself.