Bindweed is a climbing plant that twines around whatever is nearby, and in this poem it becomes a picture of someone who looks like they belong but feels they don't. The speaker keeps setting up an appearance and then undercutting it: bindweeds "fit in" but don't, seem "open" but are "hidden." The line "In front of everyones sight" is the sharpest one, since it suggests that being seen and being known are very different things.
The last stanza turns darker. Bindweeds seem destructive toward others, but the speaker ends by saying the ones who are truly destructive are those who "destroy themselves." That suggests the harm is mostly inward, and that the plant's reputation as a pest hides a quieter pain. The speaker seems to be talking about themselves or people like them, though the poem never says so directly. The mood is sad and guarded. The short, plain lines and the casual word "kinda" make the loneliness feel understated, like something said quietly so no one has to react.