sentence

*Tu me dijistes que yo iva a ser el unico
Mami explicame porque razon te fuistes yo*

could someone please tell me what that means. thanksz in advance

I think those lyrics are spelled phonetically, I'm pretty sure it means:

"Tu me dijiste que yo iba a ser el unico
Mami, explicame porque razon te fuiste yo."

which means:
"You told me that I was going to be the only one
Baby, explain to me why you left me."