Guys, Why would he reach out to another woman to vent?

My boyfriend and I broke up for a few days and I found out he contacted a woman that he made out with once but almost 10 years ago. When I confronted him about it, he told me that he was friends and they’d talk to each other when there was relationship issues going on between their partners but that was the full extend of it.

I did speak to her and she said all he mentioned how he was really depressed and talked about me and our relationship. She told me that she told him relationships work at it and to give it a shot. I don't know.

Guys, Why would he reach out to another woman to vent?
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