What do you mean, "don't be a rose, be a weed in your heart. It will grow wildly when it is slightly wet, and it will grow again when it is burned?"

There is a story called Roses and Weeds. Generally speaking, roses need careful care and can't stand the wind and rain, while weeds grow stronger after the wind and rain. This shows that the girl's psychology has changed, and she is no longer the child who is always spoiled and unreasonable. But it also shows from the side that you may have hurt her (love is not just obedience and accommodation, if this kind of injury can make her grow up and make you happier, that's ok, but remember to coax her), so this sentence can be understood as: love you, change yourself and make you fall in love with me.