<human>: Can you condense the text into a few key points?

How do I get out of the brotherzone?

I have known this girl for half a year and we clicked* extremely well. I have never met someone more compatible. We do a ton of stuff together (1 on 1) such as cooking together, seeing the sunset, studying together, eat out together, go to festivals together. I do flirt with her every so often as well. I have never met a more perfect girl.

Eventually, I fell in love with her. I decided to get a mutual friend to find out what she thinks of me. Our mutual friend told me that she only sees me as a "little brother" and that she likes older guys.

I was heartbroken. I finally confessed to her how I really feel about her and how much I care about her. I asked whether she would be willing to give me a chance if I try to look and act older than my age. She still hasn't given me a solid answer yet.

----- Guys I need your help -----

It is just the fact that we are so compatible on so many levels and enjoy each other's company so much but the only thing that is preventing a romantic spark is that I'm not old enough for her.

I am ready to put in some serious effort to act more mature, look more mature, and think more maturely in hopes that she can change her view of me.  

Can anyone give me some advice? I feel like shit* right now. I really want her to be a part of my romantic life.
<bot>: Pursued girl for half-year. She views me as "little brother" and likes older guys. Don't know what to do. Hopelessly trying to get out of the brotherzone.