When we realized we've lived a life that is totally not what we wanted one day, it is too late and almost impossible to change back, since we are so used to the person who we are trying to be that we don't see who we truely are.
Growing up is painful. Looking for and hence restoring the true me is mostly even harsher. As adults, only the strongest dare to think and take action to do so.
The true me may not be perfect in many measures, but isn't it the best one could and should do, to just accept 'myself' as is, work on his/her strength and around the weaknesses, and enjoy whatever God has blessed?