Most Helpful Girl
It depends on multiple things.
1: Does he genuinely feel bad? If so then maybe.
2: was it just a kiss? Was it just on the internet like skyping or sexting? If he actually had sex no way.
Has he cheated in his past relationships? If he has then he will keep doing it. So no.
Did he really love you. If not then say goodbye.
Most Helpful Guy
There's no point in putting yourself into a situation like that. There would be dark clouds hanging over everything, and we can never go back to what once was. So, why not do yourself a favor and stop living in the past and create a brighter future for yourself?