FearfulSymmetry: I've tried to find some good RPGS with romance options as well, but there aren't many of them around. As others have said, Winter Wolves have 'Loren the Amazon Princess' which is an RPG/visual novel blend with romance options. You might try branching out to visual novels, those tend to have romance. 'Cinders' by MoaCube is one I can definitely recommend. 'Magical Diary' by Hanako was also amusing, it's somewhat over the top but also rather self-aware, so it doesn't take itself too seriously.
EDIT: Oh yeah, there are also a few 'Choice of' games on Steam now if you don't mind text-based/choose your own adventure games, those usually have romance.
I really don't recommend Magical Diary, I played it when it came out through and through and all those romances are quite unhealthy (one unbelievably so), and more importantly, if you don't want to date certain characters but be just friends with them, they become butthurt. One believably, as he just wants to use you, but the other one just doesn't make sense. Also the game feels very lonely, your friends aren't really your friends much and it's not very long (I think you can finish the game during one evening, esp. if you don't save/reload because of the stat cramming). It starts out good but then falls through, so watch a bit beyond the demo, so you won't get disappoined, esp. if you want something in the tone of Harry Potter, this isn't it. And the atmosphere, like I mentioned, is often very sad and glum.
If you want something happy, this won't be for you, although one route makes the game happier. I might be biased,
but I was very disappointed by this game as it really isn't what I wanted or was expecting after playing the demo, so I felt like the demo sold me on a completely different game and then turned from a 'happy beginnings at the magic school' into a 'depressed, sad and rather lonely in a magic school' game.
Academagia is the way to go if you want a magical school simulator, for anyone interested, and it has about 16 free DLC with more quests, characters and skills. But I'm not sure if it contains a romance.