How to lose identification with my body and physical appearance Ever since I was a child I was very look concious. I took pride from my looks and took shame from them as well. I'm at a point where my sense of worth is mainly derived from such an unstable, diminishing and limited resource and this inconsistency is causing me a lot of suffering.
How to lose identification with my body?
On one practical side: be mindful. Meditate daily. Understand that the suffering and joy derived from your appearance is impermanent and doesn’t matter much. It is wise that you seek to reduce this attachment, but don’t do it from a place of aversion and anxiety. Accept your current way of thinking, and be patient and compassionate with your self about making a change.

On a deeper side: reflect on the fact that you are a bag of meat and organs. There’s a great talk from the Buddha about this, see if you can find it. Try to see things more clearly, more objectively. Understand that your body will gradually deteriorate and decay. Be ready for that. Of course you can take care of it, but understand that the body is not YOU, but a mere vessel with an expiration date.

Priding yourself of your body is no different than doing it with your car or house. It’s just a mere accessory.

This answer doesn’t have a clear solution but hopefully will point you to the right direction to find a solution yourself. :)