You cannot walk back into the past, but you can be the person you want to be in the future.
don't long to be the person you used to be....'cause your experiences have made you the person you are now........better to be going on in your life with those memories so you never repeat them.......
It is a hard thing, to try to recapture who you thought you were. But we are ever evolving. Just strive for knowledge of yourself. :)
Go on holiday for two weeks, you'll soon get back to who you were by the second week you'll have all your power back :-)