Hi Kokira and welcome to PC...

You did nothing wrong,,actually you did a lot right...

You cared for someone and helped her. For reasons outside of your control, she doesn't share the same feelings for you as you do her...

Just keep being the gracious and caring person you are, and someone (maybe her) will see the real value in you...

Try not to get angry about things that you can't control...it can be habit forming and hell,,most everything is outside of our control..

Lenny