There is no excuse for her not texting you if she cares she would've texted you. Yes, she is not your friend anymore but don't be enemies with her just don't text her. She probably found new friends and is happy with her life and doesn't need you in it. I think she is those people who when they find new friends they forget about their old friends. I'm sorry to tell you this but I know because I've experienced something like that. Don't hate her that is just her, just forget her, she forgot about you. And don't confront her, she knows what she's doing.