There is a song which I think came out about a year or more ago sung by a singlemale artist, quite young voice and these are some of the lyrics I remember

"your a wishing well, your a..." from a verse
"I can't believe, that im your man!, and im going to love you baby just because i can" - chorus


If you can help you're a star!!

Could it be

"Everything" by Michael Buble

It doesn't have the "you're my man" part, but everything, give it a listen and let me know.

Sorry for spamming, yes it does have the "I'm you're man" I'm a bit tired, excuse the spelling errors. It has all the lyrics, so I hope that's it!