Ran said it herself a few chapters ago, that she is not interested in getting a boyfriend (or something like that, iirc). The only person she has any interest is Keiko.
She said she doesn't want to be popular among guys. Which is kind of saying "I'm a (raging) lesbian (for Keiko)"
Also Saki likes her company. Ran is a pretty cheerful person so that's understandable. So if she liked some boy, maybe she's with him now. All-in-all I really don't think Saki is having/going to have romantic feelings for Ran.
Plus I really doubt that Keiko is going to end up with her ex. They may become friends after clearing up whatever feelings are left, but if she ends up with him all of her development will be made irrelevant and at that time the manga wouldn't have a point. I can see her ex going for Ran though eventually and that eliciting a reaction out of Keiko. Not in the 'she's mine' kind, but some kind of reaction. I don't try to get my hopes up too much. I've watched Nana xD It's been awhile of course but I see some similarities.
Also now that I re-read that particular chapter (27.5) she mentions a relapse. Which most of the people here attributed to alcoholism, but it could be that she was sleeping around with men/women because of said alcoholism, which would be maybe around the time her father had died.
last edited at Jan 17, 2015 1:42PM