MOVED ON= If you move on after breaking a relationship, you stop feeling hurt and continue with your life without looking back.

LET GO= (past) Stopped holding. In this case it means more or less "she stopped loving me and forgot about me", which is similar to "moved on".

IT WAS OVER= It ended.

GOT= (AmE) I've got, I have.

UP ALL NIGHT= If you're up all night, you can't sleep. Literally it means to stay out of bed, but it can also be used even if you were in bed all night, trying to sleep but with no success.

MY ANGEL= This angel could be her, his lost love, but the context here makes it improbable. He must be referring to the Guardian Angel. For most Christians, the Guardian Angel is a personal protection, a specific angel sent by God to protect you, something like a spiritual bodyguard. In this case, the situation is so bad that not even the Guardian Angel can protect him from the pain.

DRINKING MY PAIN AWAY= Getting drunk to forget and stop feeling this pain.

ESTO NO ME GUSTA= (in Spanish) I don't like this.

CAN'T TAKE THE PAIN= This pain is too strong for me.

TURN BACK TIME= Go to the past and change it.

TO MAKE IT WORK= To make our relationship right, so we can be lovers and have no problems anymore.

CUZ= (slang, coll. spelling, AmE version) Because.

EVEN THOUGH= An emphatic form of "Although".

THE TIMES THEY TRY= In English it is possible sometimes to use a duplicated subject for emphasis, putting the noun and then the pronoun (e.g. "My father he is a great man"). Here we have "the times" and "they", where "they" refers to "the times".

NEVER WILL I STOP= (old fashioned or poetic) In old English inversion was used when the sentence starts with an adverb instead of the subject. That is not very common today but it still happens sometimes, so we can say I WILL NEVER STOP or NEVER WILL I STOP, which sounds more archaic and so, more beautiful.

I WANT YOU BACK= I want you to come back with me.

TO THE MAX= (coll.) To the maximum = As much as possible.

FROM HERE TO THE MOON AND BACK= A common expression to say that we love someone very very very much.

DICEN QUE UNO NO SA...= (in Spanish) They say you don't know what you have until you've lost it, but it's worth fighting for what you want and give it a try.

HACIENDO HISTORIA (in Spanish)= Making history = doing something so important that it will be remembered in the future and recorded in history books.

Y TE PIDO PERDÓN= (in Spanish) And I apologise, and I ask for your forgiveness.