They're your total opposite.
Turns out 'opposites attract' is actually probably just one big myth. If your partner is your opposite and has no interest in forging some similarities or breaking common ground, it could mean that they intend for you two opposites to repel after a while.
According to relationship expert and author Matthew D. Johnson, the phenomena of like couples entering committed relationships is called assortative mating. It's much less common for opposites to be in similarly committed relationships.
[Photo via Reshot]