A happy and content man does not act like Rossi is on Twitter.
Unless Mike is the most comprehensively deluded person of all time (a possibility I am not ruling out), then not only does he severely regret that stupid viral letter to the principal but also that he ever ran Boston.
He doesn't regret it because cheating is wrong and now he has to live a lie for the rest of his life, no. He regrets it because both running Boston and the letter were supposed to feed his giant ego, something people could "like" on his Facebook page or pat him on the back about.
Only now, he is getting plenty of attention but it is nearly all bad. Boston, the letter and now his exposed cheating have a huge net negative on people's opinion of him. He didn't really care about running Boston, he cared that people knew he ran Boston and that it elevated their opinion of him. That probably worked initially (though anyone who saw that Boston video he made of himself would have been laughing long and loud behind his back), only now the pendulum has swung far in the opposite direction and his behavior on Twitter, etc, is only compounding that.
He would have been better off doing none of it. Most everyone he knows would have a higher opinion of him right now if he had never run a single step. He'll never admit that, and that's fine by me, but I'm pretty content knowing that Mike's scam at LVM was one of the biggest all time backfires.
Mike wins a lifetime of living a lie and notoriety among runners as one of the sport's all time punchlines. Well done.