Are her feelings changing for me? It seems too good to be true. Im confused.?

I am 19 years old and have had a huge crush on this girl since the day I met her about 2 years ago. She is 2 years younger than me and im really good friends with her brother. From the day I met her we became great friends. For the past year we have texted eachother or talked almost every day and have never been in a fight. She has grown to mean ALOT to me. I would do almost anything for her and be there in a heartbeat if she ever needed me, and she knows that. About 8 months ago I told her that I liked her and she said she was glad I told her and that I mean alot to her but she doesnt have the same feelings for me. I was crushed, however, she did not make it awkward at all. After that, we still talked and joked around every day like nothing happened and have become even better friends. We tell eachother almost everything. Since I told her I liked her, she has fallen for multiple guys. She never dated any of them, but they were "crushes" and each time she ended up getting hurt or lied to. Her most recent and most serious "crush" was kindof a friend of mine and they both liked eachother and became close but they never dated. That ended the same way, by her getting hurt. Each time I have been there for her and supported her just as a friend. However, ever since this last time she got hurt she has been calling me randomly just to make conversation and we also video-chat online for hours almost nightly. I also went to a movie with her and one of her girlfriends recently (however we have done stuff like this in the past also). It just seems like she is more motivated to talk to me since everything happened, and I dont know if her feelings are changing for me or if she still sees me as just a good friend. What are your opinions? There is nothing I would love more than for her to decide to date me, however, if that doesnt happen I am going to continue being great friends with her. Nothing could ever change that.