What is admiration? How to stop craving it?
You need to try and focus on yourself rather than her. Whatever qualities she admired in you, you need to show yourself these qualities. Let's say she admired your smile, every time you look in a mirror, tell yourself "I have a beautiful smile and this is all mine".

You need to accept yourself first and everyone else will take a back seat. It won't be easy and instant but it's a start. Tell yourself that you are in love with a version of her that you created up in your mind. The idea of her and "her" are two different people.

Also, writing down your thoughts help. Another technique is to realize the importance of people who love you like family and friends who are around. You need to understand that these are the ones who truly care about you and you need to get your life back on track for them. Everyday try and find something in people close to you that attracts you to them. This will help lower her importance in life.

Hope this helps!