Should I drop my ex-best friend like a bad habit?

She’s been my friend since 1st grade. She’s very self-centered and dramatic. It’s been like this since about 7th grade. In high school it got worse. She became quite the hypochondriac. She had these very dramatic asthma attacks (which she says now has been cured by her smoking habit) and always had some ailment. What I mean by dramatic asthma attack is that she would stand up in class and grab her throat and knock chairs and music stands over and “pass out” which nobody, even teachers really believed was all necessary. She was even admitted to a mental health facility for a short time. She was in my wedding, which created a LOT of drama. She somehow thought she was my maid of honor, when in fact, I had only asked her to be a bridesmaid. She showed up late to the rehearsal and the actual wedding day and made these obnoxious grand entrances.

When she calls to talk to me, it’s to do just that—- talk to me. She’s doesn’t show much interest in my life.

Anyway, I’ve been getting calls from her, but I just have no will to call her back. She finally left me a facebook message (make fun of me if you want) that said just to tell her now if I don’t want to be in the wedding. This is how she springs on me that she’s finally marrying her boyfriend of 3 years (who, by the way just got officially divorced like a month ago). None of the messages before that said anything about dire news or mentioned wedding in any way.

Should I just not call her back? I honestly don’t feel like keeping up the charade that I want to be her friend anymore. I really do want to just be rid of her. I don’t like the person she’s become. I do, however, care about her… I don’t want to hurt her feelings. I wish we could just drift apart peacefully, but I feel like this is the only opportunity I have to end it. I’m also afraid that I’d regret it later. What if this is a mistake? Should I just suck it up?

Damn, sorry this turned out so long.