Hi, Lizzardspock, welcome to PsychCentral (PC). I think you might be more invested in this friend than you would like to be; look at how long and detailed your post is and how often you assure us, "I don't expect that kind of treatment in return because as I said-she is not one of those people I truly feel connected to." Methinks you protest a bit too much!

I would just flat out tell Maya what my problems were with her the next time you have a "problem". If she asks for help with books/homework for example, tell her no, not this time, because she disrupted your work last time and she should have gotten her act together and gotten her own book by now. If you don't like the way she has treated you in the past, don't let her treat you that way when she asks to in the future! You don't have to talk to her beforehand, just stay in the moment and go with whatever is happening in the moment.

Since she's an unreliable "helper", don't ask her for help anymore? Why be disappointed? When she asks for help, look at the situation and decide what you "feel". If she's not bleeding or in danger, let her solve her own problems? You aren't there to lend her books she should have bought, give her your storage option space, etc. You need to get a little more "selfish" yourself. Friends do reciprocate but she isn't so keep her a fun acquaintance to hang out with but not "work"/be friends with!