"I could have met you in a sandbox
I could have passed you on the sidewalk
Could I have missed my chance
And watched you walk away?"
The title is, "Love Song for No One" (Oh dear, how sad!)
I can't say I can think this way. Perhaps, when I have those "emo" moments or silly pity-parties! However, I truly believe that "what-if" questions leave out God's sovereignty and negates the cliche, "If it's meant to be, then it's meant to be!" If God meant for something to happen, then He would cause all things to work out, even if it's meeting that person in a sandbox.
That's just my two cents worth.