I back you up, but cause you trouble.
I warm your blood,
Yet make it bubble.
Without me you’d get pushed around,
But careful not to cause a frown.
People like when I am present,
For my absence would deem you ‘peasant’.
A perfect balance I do require,
For you to play with others desire.
Do not give me full control,
Or else you’ll find you’ll be alone.
Use me when you need a push,
But keep me hidden in the bush.
A part of you I will always be,
With the id you barely see.
What am I?
Answer: