It was you?

The two boys that met in a playground watching each other grow up, and become men. It's a tingling feeling yet it was weird and satisfying that couldn't be described. Was it love? Or was it the past that was haunting the only one that remembers?
"Do you believe in past lives?"
"Eh? No Not really, why?"
"You look exactly like him,, I don't get it"
"Who?"
"My past lover that I killed."
Will the past break his heart, and make him let go, or will their relationship save them?