my dark decisions

i am 20 and in past have watched much of gay porn and masturbated but never did go out of my limits . recently i thought of giving up all of that as i have to take care of my family and on my journey in train , a teen(25 around) asked if he could share my seat and i touched him while he was asleep but then i realized that i was going wrong on humanity grounds and stopped it ( previously i just tapped his genitals ). he then came to know about it and threatened me ,i begged him for mercy and he did forgive me.but i feel very guilty , im usually a person who respects others and when he said that i "sexually harrased" him .since then i have changed a lot and today i need all of your responses ,i am ready to be a good human being and citizen .