''But can’t you, if only for a minute, just let yourself go?" — Albert Camus

Yes, but as you implied. Losing yourself can be a very good thing. I makes you evolve into something better with more potential. That could be called discovering yourself, or at least what you were meant to be. Sacrifice is what makes something grow in other ways. So I guess either can be seen as finding yourself. Some people lose themselves to become something new. Others run away to recover what they once were. Both involve letting go of something.