I Need to Vent

I have a friend who honestly thinks she deserves everything that I have. It's becoming very frustrated because we are two different people, with separate experiences, upbringings and solutions. Besides that I'm older than her and more developed mentally than she is. Everything she says towards me is degrading; she treats our friendship as if it's supposed to be a competition for who can get the most attention from a variety of guys and from our friends. It's very annoying because I do not wish to compete, nor try to make it seem as if it's a competition (although my attention clearly surpasses her).

I try my best to support her, although we may disagree and instead of voicing my opinions inadvertently, I ask her self-evaluating questions instead, therefore she will not feel targeted nor embarrassed.

She gives unwarranted advice as if I asked for it and insists on inserting her unethical, inappropriate opinion loudly and publicly. I'm sick of it! I'm trying to be kind enough to not call her out publicly as she does so to me, nor let her seem as if it bothers me.

I do not understand how one can be so insensitive and blatantly disrespectful yet expect others to treat her with dignity and respect. Its some things we should not tolerate. This is the second breaking point.