i-adjective
unable to let go; lingering attachment; regretful clinging
Describes a person who cannot give up on something or someone, often with a negative or critical tone. Similar to 未練がましい but slightly more colloquial.
See also: 未練がましい
彼はいつまでも未練たらしく元カノの話をする。
He keeps talking about his ex-girlfriend, unable to let go.
Stop being so clingy and move on.