relationship material
n. A status bestowed from one individual upon another exemplifying satisfaction anticipated from maintaining a relationship with that individual. This evaluation is highly subjective and typically reflects a great deal of personal preference. However, this term is usually used in situations where the relationship is not exclusively sexual (i.e., it is not used to describe a fuck buddy).
Claire: Matt is hott, but I can't stand talking to him; he is so stupid!
Jenn: Not relationship material, huh?
Jenn: Not relationship material, huh?