I'm new to relationships.

Girlfriend is clearly interested in another guy even if she won't say (she talks frequently about him, and she emulates his actions). Realistically speaking, he is the hottest guy (tall, rich, with cut features) for miles and I don't blame her. By comparison, she doesn't really care about me, and doesn't seem to pay attention when I comment.

We don't like the same aspects of the things we have in common, and she seems to get really bored when it comes to discussing stuff with me. She's called me 'brother' on more than one occasion and frankly I have no idea why she is still with me.

Judging by her conversation, her mind flits between unfaithfulness every so often.

To summarize, dropping her is inevitable, but in the meantime I want to make the most of the situation I've been given. As a person who is extremely new to pick-up who has a real-life sample to 'experiment' on, what can I do to learn more (about female behavior, etc)? After all, it can't really get much worse.