I'm in love with my best friend, what do I do!?

I've been crushing on my best friend since I met her the beginning of freshman year. That year, a few months after her and her boyfriend for over a year broke up, I told her I liked her. She told me she liked me too but she didn't want a relationship. Then summer hit and I barely talked to her. She ended up dating some guy that cheated on her and f**ked her over. She now said she is completely done with high school relationships. When I'd text her, she would either not answer, or take forever. and she never texted first. She told me the only people she texted first were her parents, this girl that is her best friend, and her boyfriend/the guy she liked. One day in homeroom, she texted me. The next three days she texted me every morning. I asked her if this was gonna be a daily thing and she said yes. For the next 3 months, we talked everyday, all day, we video chatted, and talked on the phone every night. I loved it. I thought she was starting to like me. In school everyone though we were either dating, talking, or that we should date. Her best friend told me that she thought she had liked me, but she was afraid to admit it because she didn't want to get hurt again. When I finally confessed that I liked her, she said she was sorry but she only liked me as a friend. Because of that, we drifted. She stopped texting me all the time and in school I wouldn't go to her locker every period. I asked her why she stopped and she said she wanted me to lose those feelings so we could stay good friends. We are still friends, but we text/phone/video chat, once, maybe twice a week if that. I texted her every few days and she'll either answer for a little bit and then stop, or just wont answer. But she always walks away from her phone and that's why she doesnt answer. She doesn't text me first anymore. I really miss talking to her all the time. I asked her if we could ever go back to that because I really missed it. She said she doesn't know because she feels like it all goes to sh*t when we do and that she really would rather not. I feel like I'm losing my best friend, and that I lost my shot at the most amazing girl I've ever met:( What could I possibly do to fix this?