Answer: Childhood sweethearts.
Mystery solution:
When the love is strong, people get drunk, ——'love' removes the heart = green.
Love deeply and never regret it. ——‘deep’ means wood, ‘regret’ means getting rid of heart = plum.
It’s wrong to miss you and forget you. ——‘Nian’ takes the person + wrong, and ‘forget’ takes the upper part + wrong = bamboo.
I would rather be sad and carry it on my own. ——Only the word "horse" is not a split character, but a meaning.
Don’t blame the sky, don’t blame anyone, - ‘Heaven’ + ‘Who’ = two.
Life is just a dream. ——The word "no" is removed = small.
I am used to seeing flowers fade and bloom again, - 'flowers bloom and fade' = none
But I am afraid of the origin and destruction of the relationship. ——But I am afraid that the condition will arise and then disappear = "guess" and doubt, which is the same as "horse".