lirik waiting in vain

One, two, three I don't wanna wait in vain for your love I don't wanna wait in vain for your love From the very first time I blessed my eyes on you, girl My heart says follow t'rough But I know, now, that I'm way down on your line But the waitin' feel is fine So don't treat me like a puppet on a string 'Cause I know how to do my thing Don't ... rolling in the deep lyrics meaning