Cap says there's something missing??

If a cap male is in a relationship with someone and say, "there's something missing" is there a chance that he'll break it off with her?

It depends on the context. Usually it takes alot for a cap to break of a relationship if he/she is inlove. Capricorns are pretty stable and realistic when it comes to relationships. They are not the types to think that the grass is greaner on the other side.

However if the thing missing is LOVE (or passion in some cases) then the capricorn will break it off sooner or later. That is one thing we don't compromise with.