Older people, moms ,teachers, dads, grandmas, mature people w/ experiences i need Friend advice asap?

You need to take a step back and take a breath. Friends change and so do relationships. They go through phases and you can change them. She met someone new. Do not see it as her deserting you but expanding her own horizons. You can still be her best friend and you can befriend this new girl. Three of you can be as close as two of you. You have told her how you feel and she has told you. Now you need to let things grow. She wants to see you this weekend and you need to do that if you feel like it or not. You complain and she puts forth an effort and you don't want to? That is not going to help matters. When you feel hurt by your friends you do not blow up but you have a discussion and talk it out. It works much better.