Cheating

Hi. I’ve been a silent reader here and have read many stories about infidelity, especially involving partners with bipolar disorder. In some of these stories, the bipolar partner admits to cheating, but in many others, they deny it even when it seems obvious.

It just makes me wonder, why do they choose to cheat instead of simply ending the relationship first? Is it related to the condition or just individual behavior?

I’m genuinely asking to understand this better, especially in the context of bipolar relationships. Thanks in advance to anyone willing to share their insights.