"Help" is a short, honest confession from someone who cares deeply about another person and is afraid that caring is the problem. The speaker begins with a run of lines that all start with "I want": to be there, to be trusted, to be a shoulder to cry on. The repetition feels earnest, almost like a plea, and it shows how strongly the speaker feels.
Then the poem turns. The speaker admits that this wanting, which they also call a "need," might push them into being "clingy" or "overbearing." The apology that follows is plain and quiet. There's no excuse attached to it.
The last two lines carry the main ache: the speaker wants to help but "just end up hurting." The word "just" suggests frustration and a kind of helplessness, as if good intentions keep going wrong. The mood is vulnerable and regretful, and the short, simple lines make it feel like someone speaking softly, unsure whether they'll be forgiven.