我会一直等到你回心转意的那么一天，我要让你知道，因为我是世界上对你最好的男人

I will be waiting for u til u come back to me.
All that i want u to know is that i am the one.

I will be waiting for you until you come back to me.
What I want you to know is that I am your Mr. Right.

这俩哥们译的都可以，随便选一个都不会丢人的

I will keep waiting for you if you do not come back to me, I will let you know I am the man who cherishes you most.

I will be waiting for you until you come back to me.
What I wanna you know is that I am your Mr. Right.
做了一点修改,顺溜点!