I pushed my girlfriend away by being clingy. How to get my girlfriend to fall back in love?

I am not new at this but in order to help you out I need to know what happened to make her fall out of love with you

Clingy how? How old are you and how clingy were you?

Girls or women do not like to be smothered we like our space. We like to be given room to breathe so give her the space that she needs

You can't, she will either accept ( most likely not) or she will not.

You just move on with life and if she will, then you deal with it. You can not force or make it happen

Clingy is so irritating. I can't stand clingy. Clingy is not attractive at all.

If she doesn't accept you back then you need to learn from this experience.