What's the best way to get over atypical anorexia?

First of all, I despise the term atypical anorexia. Anorexia is an illness no matter what weight you are at - it is a mental issue just as much as it is a physical one. However, to address your question: recovery is possible. It is difficult and it requires commitment. Things that helped me were to remind myself that I can be strong and active and healthy without being dangerously thin. I found pictures of athletes that I admire with fit and sturdy bodies and I reminded myself that beauty comes in all shapes and sizes. I worked with counselors to plan helpful and simple meal plans for upcoming weeks. I developed strategies to deal with my anxiety around food. Most importantly of all, I learned that it is okay to eat healthy! You don't have to cut out food or restrict to be healthy and happy, and you also don't have to eat everything in sight to be considered 'recovered'! There is a healthy in-between. Take it in steps.