Bromance! - Womance?

I've been re-watching Saiunkoku Monogatari and one thing I really like is the friendship between Ran Shuuei and Li Kouyuu. Apparently a lot of fanfiction revolves around those two, too - slash fanfiction that is. And once again I disagree with it. I do like yaoi, but as I have mentioned before, sometimes the friendship is just too precious. A sexual relationship just doesn't fit them, in my opinion.
There are many relationships in manga and anime like that, for example Kyōraku and Ukitake of Bleach and Kotetsu and Barnaby of Tiger & Dragon. Nowadays this is called "bromance", I guess.

And there's quite a few epic friendships like these, not only in anime. There's Ben Affleck and Matt Damon. There's all the buddy movies, Bud Spencer with Terence Hill, Leathal Weapon, Rush Hour. There's Miami Vice and Dr. House and Wilson. Of course there's Merry and Pippin in Lord of the Rings, Silk and Barak in the Belgariad, there's Captain Kirk and Spock and Luke Skywalker and Han Solo.
Epic bromance is everywhere to be found!

And what about women?
According to wikipedia, there's "Womance". Which, honestly, sounds like a weak copy of the male version...
And it's hardly visible. There's Thelma & Louise, of course. But otherwise? Hardly anything deserving the description "epic". There's Buffy and Willow, but they had Xander, so does it count? As for mangas/animes, there's Nana.

I think there's a lack of epic friendships between women.
Or is it only me? Are they just of a different nature?