Write down anything that you feel helps you understand this person better and might explain why they did what they did. Here are some examples that might apply to your situation.
- he/she was abused/not loved/rejected as a child
- he/she was only acting out his/her own pain
- he/she was in fear about survival/finances/work/other
- he/she was in fear about the relationship/marriage
- he/she was addicted to ___________ and was irresponsible
- I was a difficult person to be with