I will never regret you, or say I wish I'd never met you, because once upon a time, you were exactly what I needed. This is so true. everyone comes through your life for a reason, whether they stay or leave.
The saddest part in life is saying Goodbye to someone you wish to spend your lifetime with. The saddest part in a life would be to spend a lifetime with someone who didn't really want to spend theirs with yours.