Is it really possible to marry a university sim?

One thing to remember after you get back to your home world, and invite a university friend over, they always don't show up right away. I had the message saying the friend would be over the next day and it took two or three Sim days for him to show up.

Others have said, though it's not happen to me, that the university friend will come to the town but sometimes they get lost and while they don't show up at your door, they are somewhere in the town.