He's Right

You'll get lied to, cheated on, used and you'll end up disappointed.
You will try to look at the bright side find the lesson instead of focusing on the hurt and it'll get you hurt again.
You'll believe in someone and give them everything they ask for, bend backwards to make yourself what they want because there's nothing wrong with tweaking yourself here and there. But then that same person you went to hell and back for will hurt you the most and just walk away.

Then you realize you don't even know who you've become for someone who didn't love you.
Everything will seem broken and dim, pointless to no end; but it's not always like that. Sometimes they will say what they mean, they'll show they care and try their best not to lie to you.

Sometimes he will be a decent person that means it when he says he loves you and you'll be too damaged to believe it but it'll be true.
You'll run the other way thinking he's just like the rest, you'll hurt him and he will finally become like the rest; because of you.
It's a viscous cycle we've created but maybe if you listen just right you'll know which ones don't lie and save yourself the heartbreak when you've met the right one.