Question

Can someone help me fix my thesis statement. 'The hardest decisions that I ever faced in my teenage years was about my future.'

Answer 1

How do you need it fixed? You have a grammatical error (plural subject and singular verb), but maybe you are thinking more of altering the statement more fundamentally now and fixing the grammar later.

Answer 2

@jreem grammar and fixing the sentence

Answer 3

The grammar part is simple, so let's do that first.

Your subject "decisions" is plural, but your verb "was" is singular. Both should be singular or both should be plural. Otherwise your reader gets a little confused:
"Did zipp mean just one decision and accidentally type 'decisions' instead of 'decision'?"
"Did zipp mean multiple decisions and accidentally type 'was' instead of 'were'?"