your·self 
/jɚˈsɛlf/ pronoun
/jɚˈsɛlf/ pronoun 1 : the person that is being addressed a — used as the object of a verb or preposition when the person being addressed has already been mentioned ▪ You've got to behave yourself. ▪ Be careful or you might hurt yourself. ▪ When you need to relax, picture/imagine yourself at the beach listening to the gentle sound of the waves. ▪ You need to feel good about yourself. ▪ You can judge for yourself. ▪ You should make a mental note to yourself. ▪ You're making a fool/spectacle of yourself.
b — used to emphasize that a particular person already mentioned has done, thought, or said something ▪ You reminded them yourself, remember? ▪ If you're not happy with the paint job, you can repaint the whole thing yourself. — often used after the noun or pronoun it refers to ▪ You yourself reminded them, remember? 2 : your normal or healthy self
▪ You're not yourself today. Is something wrong? ▪ You'll feel like yourself again after some time away.
b — used to emphasize that a particular person already mentioned has done, thought, or said something ▪ You reminded them yourself, remember? ▪ If you're not happy with the paint job, you can repaint the whole thing yourself. — often used after the noun or pronoun it refers to ▪ You yourself reminded them, remember?
▪ You're not yourself today. Is something wrong? ▪ You'll feel like yourself again after some time away.
be yourself
: to act or behave as you normally do
▪ If you want to get a girl to like you, the best thing you can do is just be yourself.
▪ If you want to get a girl to like you, the best thing you can do is just be yourself.
by yourself 1 : without any help
▪ You will have to make dinner by yourself tonight. ▪ You fixed the car (all) by yourself? 2 : with nobody else
▪ Do you like living by yourself? ▪ You're not traveling there by yourself.
▪ You will have to make dinner by yourself tonight. ▪ You fixed the car (all) by yourself?
▪ Do you like living by yourself? ▪ You're not traveling there by yourself.
