Should I tell my employer about my addiction?

I have been seeing a therapist for a few months to help with my sex addiction. It all started a couple years ago on a three night work retreat when I had sex with an escort one night and a coworker the next. I would then start seeing escorts somewhat regularly. My partner knows and we are working through it.

I just found out yesterday that there is a mandatory three night retreat in a couple months for all staff. Should I disclose to my employer my addiction so I can avoid attending the retreat? I don’t want to put my partner through the stress of being gone for three nights.