<human>: Can you summarize the given text in a few sentences?

Exactly what the title says. I just accidentally found out that my girlfriend of 15 years cheated on me for the past six months with a guy in his 20's. I've been supporting her for the past 2 1/2 years financially while she focused on teaching yoga. I have the guys email. I have a draft ready to go in my inbox. Should I hit send?
It basically says who I am, how long we've been dating, that we have had sex until we just broke up, and that we were a normal couple. I have a suspicion that he didn't know.
<bot>: Dated girl for 15 years. Supported her for 2 1/2 years. She cheats on me with guy. I have his email address. Should I email him to let him know who I am?