Attachment is very similar to greed but is often mistaken for love and care. It is defined as an emotional bond with a thing, a person or possession. Attachment in reality is like an obsession where the mind thinks the person, situation or the object is in my control.

I possess that thing and try to hold it tight just like sand in my fist. Love and attachment seem pretty interconnected, but they are distinctly different. ... The major difference is that love is a feeling directed toward the “other” (person, place or thing), while attachment is a self-centered—meaning based on fulfilling your need.

It is mainly an insecurity of the human mind. Where one wants to owe or possess the other thing or person but is constantly scared of losing it