Like a Pollock am I
Alongside never, forever and reality I lie
With a small twist I am an excuse
Without said twist I am no use
If these clues make your answers fall short
A hint most deserved will aid your effort
I'm sorry, my friend, but we will never meet;
I must exist without you and you without me
Now that we're onto the topic of 'to be'
I'll add that my name itself defies me
My antonyms can be any
And all in all are a lot
My synonyms are not many
I tell you, zilch, nada, squat
Reasoning for answer (SPOILER)
Jackson Pollock is an abstract artist and 'never', 'forever' and 'reality' are abstract concepts
An example of an excuse through a linguistic twist: 'What are you up to?' 'Nothing.'
When taken literally, nothing is, well, good for nothing.
We can never meet nothing because as soon as we exist, nothingness doesn't.
A name is a thing - a word is a thing. Therefore, naming it or identifying it in any way renders 'nothing' nonexistent.
Synonyms and antonyms are obvious, there's a reason that was my giveaway hint.