I'm not a very reliable person seeing that I'm not very good a SAC, but I have some ideas that you could potentially use for that idea.
1. Doing a cross-cultural comparison on people from generation y and generation z. You could ask them about their romantic ideals and compare gen y and to gen z and see how they differentiate (because gen y didn't grow up with the media that gen z has, your results will definitely differ).
2. Doing a cross-cultural on male and females, and comparing their romantic ideals and seeing if they link to the current media.
I hope I could be of some help and hopefully you bounce off my ideas to create an even better one! But make sure to tell your teacher beforehand so you know what you are doing is correct. Good luck my friend, we can do this!