Incompatible

[Sarah]

Incapable of being together without mutual reaction ordecomposition, as certain medicines. Incompatible terms (Logic),terms which can not be combined in thought.

[Sarah]

another word for saying youre not my type"

A boy is just trying to dump you if he says "were

[Mark Zuckerberg]

not able to exist or work with another person or thing because of basic differences:

[Monty]

(of two things) so opposed in character as to be incapable of existing together.