Why can't I ever have a happy relationship?

Happiness in relationships almost seems boring. I’ve never been in a stable, relaxed, long-term relationship. My partners say I “create conflict” and am all over the place. I think Im being reasonable… I would always question and doubt things. Isn’t that normal, though? How can I blindly trust and avoid what bothers me. There’s always something that does bother me, which may mean I’m insatiable and neurotic—but I’m not sure.

Is it normal not to feel confined in a content relationship and be erratic, problem-creating, doubting at most times? In a scenario where you are in a relationship, it seems impossible to relax and avoid the issues you might have. And believe me, if you look, you can find millions of issues.