One-sided Friendship

This is going to be a short post, a little bit of a vent, but mostly just thoughts I've had about human interaction. I've been dealing with a friend, actually a couple of them lately, but mostly one who I'm noticing more and more what a one-sided friendship it is. Now, I've never been one for keeping score and having to keep things even exactly, but you have to have some give and take for it to really be a friendship, much like marriage. Lately it seems like this one friend has gone from being there for me very little to almost not at all. I understand distance and time not really being an issue with real friendship, but my feeling is it has to be a mutual distance from one another. The problem is that this friend has high expectations of me. I support this friend and am there for this friend fairly consistently... and I do it because I WANT to do it. I enjoy being a good friend and a part of this person's life, but it's starting to get hard not feeling a little put off by the one-sidedness of it all. As I expressed before, I don't keep score. ....however, I would like to be thrown a bone every now and then. I know if anyone is reading this, their thoughts are that I need to talk to this friend and it will come to that as things continue this way. I guess I just needed a place to vent and collect my thoughts first. I've confronted this friend before and she's a little insecure in handling confrontation and felt attacked previously. It will be a touchy subject, no doubt. *sigh* I like this friend and she's a great person, otherwise, why would I bother? I guess my real dilemma is determining that point when a friendship is no longer worth it. This certainly hasn't been the first time I've had to face this issue, but it's usually been a lot more clear to me if the person is worth it. Sometimes it's really hard to tell the difference between you being the petty one and needing to overlook something and a person taking advantage of you and you needing them out of your life. *HUGE SIGH*