Three words and their meaning

An abundance can be said in three small words,
Especially between lovebirds,

“I love you”
“You complete me”
“You are mine”

But there the terrible thing about these wonderful lines,
Eventually, they will inverse in due time,

“I despise you”
“You’ve destroyed me”
“You’re nothing now”

But occasionally three words doesn’t suffice,
These are the six words that took their price.

“I’ll be here, no matter what”
Along with what brought along my doom,
“I wish, I never met you”

Words are the vice in many people’s lives,
Especially when it comes from those you prized.