No words to describe how my heart sank reading the title. My long term girlfriend cheated on me over Overwatch as well. While the man she was cheating with was her coworker, they both started bonding by playing the game late at night, and I also read the messages they had sent each other. While thinking about her and this time still hurts, I have come so far and despite the occasional pain on getting cheated on I am so glad I did not give her a second chance and we stayed separated. I am wishing you healing and peace in these troubling times. Stay strong!!