Like Perna, I'm not sure what it is that she does that annoys you? What are the little annoying habits? Depending on what they are, it might be the sort of thing you could point out to her, or they might just be the sort of thing that you'll have to accept and live with.

When it comes to it feeling like you're participating more in the friendship, you could tell her that you miss her. You could also try setting up a friend-date with the rule of "When we go and do X, we're both ignoring all the negative stuff in our lives and just living in the moment and having fun!" (Some of my friends and I do that... we ban certain topics while we're out or we'll just end up ranting the whole time!)