Hi! I was thinking if the crush can be a different being like:
-Alien! (I'm a geeky sci-fi fan! He can be an adorable Grey or a cute hybrid!)
-Cyborg! (Check out Terminator?)
-Angel (Peek in the series of Wings of Desire)
-Neko! (A catsy human!)
-Wizard (For the sake of the Potterheads out there)
-Demon (If he is REALLY TEMPTING)
-Program! (You'll get this if you watch Tron: Legacy - Rinzler is so awesome!)
-Test subject (An experimented human)
-Zombie (Hmm...)
I know I'm weird, since I never had a crush at all, and I got these ideas for your crush imagines (ironic, isn't it?), don't worry, I can wait! ;)