If you loved Ghosts of Girlfriends Past, try Vampire Academy
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Mark Waters, and they both carry the playful mood tag, and they sit in Comedy / Fantasy territory. If that's the register that drew you to Ghosts of Girlfriends Past, the second film will land in a comparable space — through a different lens.
playful
What Vampire Academy is
Vampire Academy attempts to blend fangs with laughs. Rose and her friend Lissa are returned to St. Vladamirs Academy. It mostly succeeds at being a lighthearted teen romp.

