by myself

by (oneself)

1. Alone. Because there's usually so much going on with the kids, I really enjoy spending a quiet Saturday night by myself.
2. Through one's own efforts alone. You can't move that table all by yourself! Here, let me help you. My little girl loves to get dressed by herself, so tutus and cowboy boots have become the norm around here.
See also: by
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

by myself

 
1. with no one else present; alone. I sat at the table by myself. I will not be at the party. I will be at home by myself tonight.
2. without the help of anyone else. I did it all by myself. Can you eat that whole pie by yourself?
See also: by, myself
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also:
References in periodicals archive ?
I moved to the United States by myself three years ago when I was 15 to attend the Interlochen Arts Academy.
The yearning for adventure that camp had implanted in my heart gave me the courage to drive to Glacier National Park, Montana, by myself the week after my graduation.
I was all by myself though so all my friends assume I'm lying about that.
ONE TIME I WAS SKATING this ditch by myself and my skateboard hit me really hard in the testicles and I fell down and rolled to the bottom of the ditch.
"I have a stepbrother and a stepsister, older, but up until fourth or fifth grade I was by myself. My morn kept getting married and moving around and breaking up.
She expresses this view with some frequency when discussing her way of working, which is to say the way she's always preferred to prepare for performances, doing "a lot of rehearsing by myself." She states that "Balanchine taught me to go into a studio and work by myself; and that's what I like to do." These "request rehearsals" are something of a tradition at NYCB.
As the group ate, I sat outside by myself, antsy to hit the trails again.
With his two hit plays, I Can Do Bad All by Myself, and I Know I've Been Changed, Perry has recently helped revive the urban, or gospel, theater industry.
Currently, Perry's in the process of negotiating with various Hollywood executives a TV sitcom based on I Can Do Bad All by Myself.
Sworn testimony has already been given by myself as to the truth of this Eucharistic miracle.
I was doing all these things by myself. It was only later that I learned other people were doing the things I fantasized about, which really threw me.
All By Myself: The Unmaking of a Presidential Campaign In case your're still wondering, it was all Michael Dukakis's fault.
But he was happy that I was no longer staying home by myself, feeling lonely isolated from other kids.
Sometimes I spend whole days driving by myself from one city to another to preach a parish mission.
So while my athlete friends spent their afternoons on the field or in the gym, I was out in the woods, sometimes with Dave, sometimes by myself, identifying plants with Peterson's Field Guide.