Section 71.003 or the Texas Family Code states Family violence means:

(1) an act by a member of a family or household against another member of the family or household that is intended to result in physical harm, bodily injury, assault, or sexual assault or that is a threat that reasonably places that member in fear of imminent physical harm, bodily injury, assault, or sexual assault, but does not include defensive measures to protect oneself;
(2) abuse, by a member of a family or household toward a child of the family or household; or
(3) dating violence, as that term is defined by Section 71.0021. 

Dating violence means an act, other than a defensive measure to protect oneself, by an actor that:

(1) is committed against a victim:

(A) with whom the actor has or has had a dating relationship or 

(B) because of the victim’s marriage to or dating relationship with an individual with whom the actor is or has been in a dating relationship or marriage; and

(C) is intended to result in physical harm, bodily injury, assault, or sexual assault or that is a threat that reasonably places the victim in fear of imminent physical harm, bodily injury, assault, or sexual assault.

(2) For purposes of this title “dating relationship” means a relationship between individuals who have or have had a continuing relationship of a romantic or intimate nature, The existence of such a relationship shall be determined based on consideration of :

(A) the length of the relationship;
(B) the nature of the relationship; and
(C) the frequency and type of interaction between the persons involved in the relationship.

(3) A casual acquaintanceship or ordinary fraternization in a business or social context does not constitute a “dating relationship” under Section (b).

“Household” means a unit composed of persons living together in the same dwelling, without regard to whether they are related to each other, including persons who previously lived together.