Authors:

I'm not big on regret - until time travel actually exists, it seems like a waste of making yourself feel bad

Julie Klausner (2010). “I Don't Care About Your Band: What I Learned from Indie Rockers, Trust Funders, Pornographers, Felons, Faux-Se nsitive Hipsters, and Other Guys I've Dated”, p.36, Penguin
I'm not big on regret - until time travel actually exists, it seems like a waste of making yourself feel bad