12. Capricorn.
Capricorns have a lot of lovely qualities that help in a relationship, but even though they are known for being intelligent and honest, they are also known for caring about themselves more than others. This serious sign has confidence for days and has a low tolerance for anyone who doesn't see things their way. The best thing for a Capricorn to do in a long-term relationship is to try to relax and understand where their partner is coming from. If they don't, things might take a disastrous turn.
