Learner's definition of MYSELF
1 : the person who is speaking or writing:a — used as the object of a verb or preposition to refer to yourself after you have already been mentioned
b — used for emphasis to refer again to yourself after you have already been mentioned
I accidentally cut myself while cooking.
I'm going to get myself a new car.
I bought myself a new suit.
I consider myself to be a pretty good swimmer.
I had to ask myself if this was what I truly wanted.
I reminded myself that this is just a game.
I told a bad joke and made myself look foolish.
I am proud of myself for finishing college.
I could no longer keep the secret to myself.
I'm doing this for myself. [=for my own benefit]
I said to myself, “Here's a man who knows what he's doing.”
I had the house (all) to myself. [=I was alone in the house]
I wanted to see it for myself. [=to see it rather than have someone tell me about it, describe it to me, etc.]
I told him so myself.
If you won't go, then I'll go myself.
I myself have never been to Italy.
I myself have experienced the same thing.
2 : my normal or healthy self
I was nervous and uncomfortable and just didn't feel (like) myself.
I'm not feeling (like) myself today. I think I may be coming down with a cold.
I'm not myself today. I just don't feel right.
I find it hard to be myself [=to relax and behave in my usual way] when I'm with people I don't know well.
1 : without any help from other people