Dictionary.com
pos·ses·sive
Pronunciation[puh-zes-iv] /pəˈzɛsɪv/
–adjective

jealously opposed to the personal independence of, or to any influence other than one’s own upon, a child, spouse, etc; desirous of possessing, esp. excessively; a possessive lover or pertaining to possession or ownership.

Of or relating to ownership or possession; Having or manifesting a desire to control or dominate another, especially in order to limit that person’s relationships with others: a possessive parent.

serving to express or indicate possession; desirous of owning; having or showing a desire to control or dominate.

showing that someone or something possesses an object etc
Example: `Yours’, `mine’, `his’, `hers’, `theirs’ are possessive pronouns; `your’, `my’, `his’, `their’ are possessive adjectives.

Sometime these sides of you can really killing me.