;D You know you love it. XD jk
I am very happy to hear that. ^^ It means I will be able to keep you RPing with me. XD
Honestly, I have been a bit...interested in it for a while. It's like my RPing a pussyboy: I don't do it but I almost sort of want to.
The secret is up to you, but a couple of ideas I had:
Your character is an angel that fell from grace because s/he forgot what 'love' is and in a sense forgot what god is. When s/he falls for my character, truly falls, s/he is allowed back into heaven, but doesn't want to leave my character. However, if s/he doesn't, then when my character dies, s/he will be doomed to earth forever.
Your character is a demon that traps souls inside of paintings when the paintings are completely. S/he loves teasing his/her prey though and only finishes a painting once he has the human emotionally attached to him/her. However s/he ends up falling in love with my character and because of that, the compulsion to finish the painting is even greater, but s/he doesn't want to trap the soul of my character.
Your character is a god of some sort and any human s/he falls in love with must past several trails or they are killed. These trials are difficult and my character's life would be put in danger for most of them so s/he tries to take him/her into hiding so that they don't have to face them.
Ooooor you can come up with something completely your own. =D
Vampire prince, werewolf warrior, elemental nomad, etc. *shrug* I was just giving plot ideas I had. ;D