What Should I Do now ?

I used to volunteer at an elementary school one of the faculty members i helped became a really good friend of mine she brought me coffee we joked talked and were really cool with each other. one day she commented on wanting to introduce me to her niece. i was cool with that and we kept on going as usual. a week after i invite her and some of people from work to my house to watch a boxing fight. she tells me that she is going to Disney with her kid , her niece and someone from work. i told her ok, next day i go over to her house and she introduces me to her niece. she looked like a child of Julia Roberts , very nice petite body .we hardly get to talk as we needed leave. we go to Disney and we have an awesome time we laugh and we have a plethora of things in common. we talk non-stop even when we are in the rides. we go back to her home to drop her off and her aunt tells me that she did not tell her niece's mom that she was going to hang out with another guy of her same age. so i go on to my house and the aunt starts to text me on how she had fun and that her niece would be lucky to go out with a guy like me , then her aunt tells me that she is going to give her niece my number and i was like sure. i talk to the girl for a while and i tell her if she wants to hang out sometime and she says no politely. we start testing we go one to text for a while and out of nowhere she starts to ignore my texts. she graduated from high school last year and now she goes to my college. she ignores me completely. i asked her aunt what happened and her aunt told me to stay away from her and to never talk to her niece again, i ask her why and she says that i am stalker that just wants to hit it and quit it. and that she will beat me up if i get close to her niece and now it has been a year and a couple of months since the day i meet her and i can not stop thinking every single day. What should i do ? i truly love her and i can not just forget about her i have tried.