How do I make her stay?

There isn't much you can do, you can not force someone to be with you no matter how much you care. All you can do is ask her to talk and express all of your feelings openly. Let her know how you feel. If you completely putting yourself out there isn't enough for her, then you need to let go. She doesn't deserve you if she doesn't see it and it's not healthy for you to obsess over someone who doesn't return that passion. You need to learn to find beauty in other places, don't always compare to her.

Take her off the pedestal, that is not healthy. She is a fallible human being just like you, and it seems like she doesn't want to be with you anymore. Get all thoughts of "making" her stay out of your head, because you cannot force her to change her mind if she wants to go.

It is a hard fact of life, but there is no way around it. Clinging to her desperately will only force her away from you faster. If your words mean nothing to her, then talking more won't change anything. Let her go and let yourself begin to grieve so you can move on with your life.

I definitly have had this exact experiance with my boyfriend. When we broke up with me i was completely destroyed. He was my everything and i lost him. When that happened the last thing i could do was except it. I could not let him go , i had to do whatever i could to stop him from leaving. But all i could do is try and show him how much i wanted him and how we belong together. If this is something you really want, do not give up. Work for it and prove to her that you do love her and that she is everything you want. As long as you try your best, thats all you can really do on your part.