Never noticed

I slowly replay the memories in my head
the times where we were happy
and content with each other
but slowly everything changed
but i never noticed
i never noticed the look you gave passing girls
i never noticed that when you said you were busy you were with other girls
i never noticed
i was too dense
i didn't realise our relationship was going down the drain
until it was over
but the memories are not like life and love
it can't be replayed over and over
you never get a second chance because once it's gone
it's gone