Lets say you have a person of the opposite sex that rejected u (because at the time she liked somone else) a while back, but you guys are good friends now. What would you use to make her jealous/wanting you/regret/ whatever else, that she didn’t say yes to you.
Move on. Seriously.
And if you talk about yourself, just do it, or are you “a person”? It makes you a man 
there is nothing wrong with a little jealousy lol And no lie, its for one of my friends who just became friends with one of my other friends (met through me) And she tells me she doesn’t like him like that (but she sounds like she is lying and doesnt sound confident when she says that. I think she needa a push) i hope i dindn’t make it sound confusing.
Sunny’s right. Tell “your friend” to move on.
The “trying-to-make-someone-jealous” thing applies far more to you guys than us gals. We ain’t by-and-large terribly impressed by it, and if you didn’t stick around to take a second shot - why should we even be interested?
Men will never fully understand women, and vice-versa, but one thing about women? We cannot abide stupidity..
Ail 
Good advices above, but if you insist …
The pheromone to use to achive that, is called ‘New Girlfriend’.
Try Instant Jerk - no experience with it - but it could be just the ticket according to it’s write-up.
Matt