The other day I went into my favorite coffee - shop around the corner , and saw an ex sitting at the counter . I did not look at his direction , mostly out of annoyance and mistrust . We have not dated in over a year ever since I broke - up with him because he kept lying , cheating , and treating me as though I did n't matter . I grab my coffee and left .
Question: What may have happened before I broke up with my ex ?
The answer to the above question:


He cheated on me .