If you've read the Fallen series by Lauren Kate, that's the basic idea of what I am wanting to roleplay, just maybe a bit of fudging to make in more of our own.
If you haven't, the generalized idea is that character A and B are soul mates, and they're always kept apart by evil forces beyond their control and have spent lifetimes finding and losing one another in the end. The only way to realy break the cycle is for character A to get her memories back of their past lives together and actually fall in love with character B before the sun sets on her 20th birthday.

Except I sort of wanted to go with a vampire take on the story, with me playing the human who keeps dying and being reincarnated. We'd be playing in the modern age, and we can discuss how our characters end up meeting again. But I wanted to spend some time with the two getting to know each other before we go into discussing why she was cursed in the first place and how the two would go about breaking it.

So, if this is something you might be interested in, let me know or if you've got questions feel free to message me!