Is My Happiness Making Me Unhappy?

I'm not used to happiness beyond the short-term. Finding someone I'm comfortable with all the time is unsettling to me. I keep waiting for her to get tired of me and leave me. I can't decide if it's intelligence or madness that drives these worries. But when I think of her, I smile. Even her flaws and faults, ever exaggerated in my mind. Hmmmm, yeah. Yeah, I love her.