Música do N´sync

Hi fellas !
That´s my first post...

I would like to know what´s the meaning of "to get burn" and "No strings attached"

I put a part of the lyric so you can get it better, maybe. (it´s bolded) - existe bolded ?

Thanks !

Take it from me, it's a lesson to be learned
Even the good guys get burned
Take it from me, see I would give you love
The kind of love that you've only dreamed of

Chorus:
Baby you're not the only one
You don't have to be afraid to fall in love
And I know that you've hurt in the past
But if you want it here's my heart
No strings attached