I can't promise that I'll be the wealthiest man in the world
I can't promise that I'll be able to get you anything you want
I can't promise that there won't be times that we'll argue or be upset with each other
I can't promise that I'll be able to be with you for every second of the day
I can't promise that we'll be in love forever
But
I can promise that I'll try my hardest every single day that each one of those cants  becomes a can.