The speaker here is hurting and wants someone to notice. Each stanza asks a question that begins with "how much" or "how many," and each one circles the same worry: how long will the pain have to go on before the person on the other end finally pays attention? The image of petals torn from a bud is the sharpest one. A bud hasn't even bloomed yet, so it suggests something young and tender being damaged before it has had a chance to grow.
The speaker feels trapped between two kinds of distress. They look back with longing at the past and forward with fear at the future, which leaves little room to feel steady in the present. The last line, "how much?", stands alone and sounds almost worn out, as if the speaker has asked so often that the question is all that's left. The mood is raw, sad, and quietly desperate, with an undercurrent of frustration at being overlooked.