I'm going nuts! How does that quote go... something like this..?

Question

"if you let them go and they come back on their own then it's meant to be?.... it's a saying that I can't think how it goes.. it think it's about love

Answer 1

I've seen a bunch of variations on the web:

“If you love somebody, let them go. If they return, they were always yours. If they don't, they never were.”

or

"If you love someone, let them go. If they return to you, it was meant to be. If they don't, their love was never yours to begin with..."

Although the best is the one from Wayne's World:

Garth: Uhm, Wayne? What do you do if every time you see this one incredible woman, you think you're gonna hurl?

Wayne: I say hurl. If you blow chunks and she comes back, she's yours. But if you spew and she bolts, then it was never meant to be.  

Answer 2

if you love something let it go

if it doesnt come back then it was never meant to be

Answer 3

If you love something, set it free

if it comes back to you , it is yours

if it doesn't, it never was