You don't fall in love with someone because it's convenient.

Not to be with the one you love, Laura, the one person you should be spending your life with--it’s like a kind of living death. To wake up every morning and know you are still here. To have that brief, sweet moment of blankness, before your mind reminds you who you are, and why you are unhappy. It was like hell. A living hell of the heart’s own making.

No, she learned that true love was epic stuff, as told by Mary.

Everyone's allowed to be in love with the wrong person at some point. In fact, it's a mistake not to be.

The trouble is I'm not very good at trusting my own instincts. I've been wrong before. A lot."
"About what? You worry too much, about everything. You're to hard on yourself."
"I was wrong about Rory -"
"You were twenty-five, twenty-six! Everyone's allowed to be in love with the wrong person at some point. In fact, its a mistake not to be.

Hell is truth seen too late.