Letra de Fireworks contain regret

I once, wrote a song
About a regular breakup
(about a regular breakup)
about a regular break up
I thought about the truth,
theres no girl as beautiful as you,
I feel i´m at my all time low
but girls you know, they come and go

I feel so tired, lost alone
When I was younger, I was a liar,
and i´ll be the first one to admit
losing you, is what I regret

and a full year, has almost passed
where we sat alone together
(where we sat alone together)
where we sat alone together
and I took you by the hand
and I looked you in the eye
well girls you know they come and go
but your the one that changed my life

I feel so tired, lost alone,
When I was younger, I was a liar
and i´ll be the first one to admit
losing you, is what I regret

When you moved on, a day later
its taken me months,
to admit all my faults,
to admit i´m wrong
lost alone