I was with my ex for 8 years, first 2 years we fucked like rabbits, 3rd year it slowed down and for next 4 years she did not let me touch her, she always had reasons to avoid sex. I stayed faithful until one day middle of the night checked her phone when she was asleep and saw different guys messaging her. Next day I confronted her and she denied everything and she blamed cause I invaded her privacy. I then broke up after couple of months since I found more shit about her and had solid proof of all her activities behind my back. Long story short, the day I found out about her cheating on me was my first punt. Now if you ask me how has it affected my relationship? I do not trust girls any more and have trust issues since my last GF also got caught cheating on me.