BFFs. Frenemies. Gal pals. Do you know who has your back, or who is rolling her eyes behind it? Heed this handy checklist of five friends every woman needs on her speed dial -- and three you should defriend stat.

The Cheerleader: She's the first to give you the ol' thumbs up on your Facebook statuses. She's the one you're calling as soon as your horrible Match.com date is over. Why we love her: unconditional support.

The Brutally Honest One: If you're deciding whether you really need your eyebrows waxed, or whether to call that guy who just isn't that into you but might be someday if you can only change his mind, she's the one to take you by the shoulders and tell you how she really feels. Why we love her: She's willing to risk hurting your feelings for a good cause -- never letting you make a fool of yourself.

The Wise One: She's ridden the roller coaster of life, and now she's there to hand-hold you through your ups and downs. Why we love her: She gives the best advice, because she's been there and done that. Nothing shocks her. Nothing. Try her. We dare you.

The Old Pal: She remembers when you wore fuzzy pajamas with feet and played "light as a feather" at sleepovers. Why we love her: You don't have to explain yourself, she already knows you. And most importantly, she gets you.

The Guy Pal: He doesn't analyze your outfit, take it personally if you're cranky, or need to hear every last detail about what's-going-on-with-your-life in the past two weeks. He just wants to hang, yo. And discuss whatever comes up. Like shiny things.

Three Types You Can Do Without
With "friends" like these, who needs enemies?

The Underminer: This type is sneaky. It's not exactly what she's saying, but how she's saying it. After you've hung out with her, you may notice a feeling of Hey, did she just diss me, or is it just me? It's not just you. It's her. Drop-kick her (she won't even notice).

The Topper: Just got a job promotion? She'll mention her five promotions in the past five years. Ran your first 10K race? Expect a rundown of her last marathon. No matter what your story is, she has something up her sleeve to one-up you. Drop-kick her (she'll just recall the time she was the star kicker on her soccer team).

The Judge: Remember when you had that meltdown? And she was all cool and collected and comforting at the time? Well, she was actually tallying your drama on a handy mental checklist. Drop-kick her (she'll judge you for being passive-aggressive, but it's worth it).

Megan McMorris is the editor of "P.S. What I Didn't Say: Unsent Letters to Our Female Friends" (Seal Press, October 2009). Visit www.psanthology.wordpress.com for excerpts -- podcasts coming soon!