Not much of a friend anymore?

Hi, I have a friend that I met online about a year and a half ago. She can be a good friend at times. But, in the last half a year, shes gotten pretty narcissistic. She apparently is prettier than me, though shes never seen a picture of me. Has larger than me, (I find that pointless, but I have never told her my bra size... why would I?). She is undoubtedly God's gift to me. And I can hardly count how long I've had to endure listening to her trite teenage angst. While I've had problems of my own, I had to listen to her go on and on about what I find pointless things. Through out this, I've looked at this from a "what ever helps her sleep at night" point of view. But lately I'm pretty sick of it. Its hard to speak to her seriously that it bothers me. I wouldn't be heart broken if the friendship ended, but it would be nice if I could keep it. And I have another friend through the same place we met and shes also friends with him. And I know if I say anything, she'll go off and probably turn him against me. I can't stand drama, and I usually don't let myself get involved in it. But I suppose you can only dodge that bullet for so long. Any advice on what I should do next? If my friendship with her ends, so be it, but I would like to stay friends with the other person.