How Can You Do That?

How can you cheat on the supposed to be the love of your life when at the end of the day y'all are supposed to be so tight be together for life why don't you understand the feelings I have for you are so true that I would give up the world just to have you but I guess you won't know how much I mean to you till the day I'm so far gone and I know in my heart we will be no return.