I indirectly blew my parents marriage

When in school I had few friends. I still had a best friend and we often travelled together. I grew up in house without car or any luxuries. He on other hand had rich family.

Whenever his dad had to come to school for pta meeting or annual functions he would pick me. My dad could never make it to my school stuff because of his work and it was always mom who accompanied me. This gave them chance to know each other and led to affair that lasted for over a decade.

When my dad finally caught them she begged for forgiveness and he pretty much gave up on the marriage but didn't seperate because of family and name. My house has not been same since a year and he doesn't talk to her or anyone much. I wish I never had him as a friend and my family would still be happy like it was before.