Thought We'd Last Forever

You were the worst mistake I ever made
But somehow you were also the best
You were nothing like all the rest
But you left me in the biggest mess
There are so many things going through my mind
I don't know what to do,
I keep wondering if maybe I should give up on you
I know it may be the best thing to do,
But a part of me just doesnt want to
I can't stand us not being together,
It may sound stupid,
But I really did think we'd last forever