Alice has nothing but the most impeccable standards for who dates her.
Alice gets into an incredibly long relationship who has all the hallmarks of "The One", but refuses to consider him as such.
Subverted: It seems like Alice has found the one.
Double Subverted: Oh wait, he was more of a jerk than the other guys.
Parodied: Bob is around - he's everything Alice wants, needs, and should look for in a man. He's handsome, has a great job, and is an all-around saint. However, Alice repeatedly ignores him to go after worse and worse men.
Zig Zagged: She's found the one! Wait, he's a bigger jerk than usual. But that was just at first and she changed him into a better person.
Averted: Alice has regular standards.
Enforced: "We need a depressing character on this show. How about one of those women who's always trying - and failing - to find the One?"
Lampshaded: "Well, that's the twelfth guy I've dated that's not the one."
Invoked: Alice runs into Carol, who has found the love of her life. She starts thinking...
Defied: Alice decides that she might not find the one, but she'll be happy where she is.
Alice never finds the one because she's so busy dating around.
Alternatively, Alice gets into an incredibly unhappy relationship. But she's so exhausted from searching for men that she refuses to believe he's not The One.
Alice has a tough time discerning "The Butterflies" from actual love; when "The Butterflies" feeling fades, she assumes that she has fallen out of love with the guy (and/or that he has fallen out of love with her), not realizing that real love takes time and effort, and is about far more than schmoopy feelings.
Reconstructed: Alice eventually finds her man after a great deal of searching, and puts work into the relationship.