Your possessive over something you realistically shouldnt be possessive of, and thats his love life.
Cancer
Your ex thinks youre crazy because you let your emotions get the best of you.
When youre hurt, you feelreallyhurt, when youre sad, you feelreallysad.

God & Man
Virgo
Your ex thinks youre crazy because you overthink EVERYTHING.
He thinks youre crazy when you dissect every little thing about what you two used to have.
Libra
Your ex only thinks youre crazy when the grudge youve been holding for centuries surfaces.

You know everything, and everyone who knows you knows that, including your ex.
Youre independent, and when your relationships end, they end.
He thinks youre crazy, but your breakups become brilliant creations so, whatever.

God & Man