Confused....please Read

Hello

i have a dilemma that I could really use an unbiased opinion.

I am currently 20 years old...About 4 years ago my best friends sister started to have a crush on me....Of course I wasn't for it, cuz she was just my friends sister at the time. However, as our friendship grew stronger...I started to develop feelings for her. I definitely saw her as more as a friend, so when I was 19 (she was 17) we started dating and things were going great. Then it was time for our first kiss....So it happened and it was fine.....

..But it seemed like clockwork that the day after the kiss, she started to act weird and cold to me. She like totally changed. She said that she just wanted to be friends, and I was fine with that. Months and months went by, and she still kinda treated me like garbage. She always kinda downtalked me. She never gave me any sort of satisfaction...Like when I was happy she tried to get me in a bad mood so I wouldn't be happy anymore. And I don't understand....She always says how i'm one of her best friends in the world and she's lucky to have me in her life....But she always gives me the cold shoulder...Which I don't understand because she had a crush on me, a huge crush, for like 3 years. Then she got what she wanted, and she just threw it away. So recently I kinda told her I need a break from all of the poor treatment.....I haven't talked to her in like 2 weeks.

What I want to know is....Why is she so distant from me now? Am I doing the right thing by giving her space....A lot of it? Because its been about 11 months since she told me she didn't want to date anymore....And her attitude toward me has never changed...Always ignoring, turning her back on me, talking down to me, telling secrets in front of my face, not letting me be happy...

I do still have strong feelings for her, but I know I deserve better, ya know? So I just want to be friends...But I can't keep on bending over backwards for someone that is rude, ya know? So a question, for the ladies, is why is she doing this? What does she want? Keep in mind that she's 18 years old right now, and i"m 20. Anything on how she might be feeling might help.

Tee