How do you cope with a thunder buddy leaving you for another opportunity?

90% of me is happy for my friends. 10% is selfish and tired of good people leaving our company.

All in all though, I must recognize that moving on to another opportunity whether it does end up good or bad is a big step and it takes some serious courage/bravery. The premise of that has me fired up for them as well because operating in the unknown is without a doubt where growth lies.

I'll get over it eventually, but wanted to know some strategies behind how to deal. Pint of ice cream, crying in the shower, screaming in your car, staring out at the ocean aimlessly while the wind blows through your hair, etc? Lemme know.