I want to be her friend, I don't know what to do?

There is this girl that i've know for most of my life. I really like her and i've actually liked her for most of the time that i've known her. I some thing admittedly stupid and I asked her out the first time I had seen her in like 5 years. She just laughed it off and we talked some more that year. Not so much as friends I guess but more like accquantences. The year after that, my eigth grade year, we talked a lot more and I like to think that we got pretty close. But that summer, once again I got stupid. I asked her out, and this time she wouldn't talk to me until a few weeks later. After that I went to a different school and we didn't really talk for about three years. Here lately i've been trying to talk to her again, and all i want to be is her friend. She gave me her number when she was going through a rough time a few months back but now she just pretty much ignores me, doesn't text me back, etc..... I've changed alot and I know that if I could get her to talk to me she would see that and just maybe we could be friends again. But it's kindaa like taking a blind person to a silent movie. It just isn't working out, ya know? So does anyone know what I can do?