I tried to translate a Brazilian song

"... There are people who are on the same side as you, but should be on the other side, there are people who hurt others, there are people who don't know how to love, there are people fooling us, see how our life is, but I know one day we learn, if you want someone to trust, trust yourself, who believes always reaches..."

Good job! Song lyrics can be difficult

I agree with Sally, except for the last line. I would write:

He (or one) who believes always arrives. 

I don't think "reaches" works, it needs some kind of object...

Also, a subject is needed, even if it is neutral. 

Também, a canção é "Mais uma vez"? 

-John