<human>: Give me a shortened version of the text

I received an email from a guy I sort of dated eleven or twelve years ago. We didn't have a sexual relationship but we were romantic albeit short-lived.

He has been traveling and pondering his life I guess and he emailed me saying some nonsense, "You're the only girl I loved." Now I get the feeling (because I am a cynical jerk) that he likely sent this email to several other chicks too. 

But the thing is I have an occasional fear/worry that people from my past and/or my past actions will come to haunt me. Granted I have paid the Karma Bitch quite often over the years, but I am the first to admit I am no angel, and, in the past, I was a big asshole.

So receiving an email like this, even though I was inclined to not respond, I figured if I didn't the guy might change his admiring tune to something a bit more hateful or angry. Who knows? I just responded with something innocuous like "thank you and hope you are doing well" sort of deal.

Do you think it was a bad idea to send the email? I wanted to be polite and potentially control any backlash.

Do you think I should let my boyfriend know this guy (who wasn't even important to me back when I was 20 let alone now) emailed and I responded? I have been with my boyfriend since July of this year.

I just want to maintain an honest relationship and do the right thing.
<bot>: Received an email from some dude I dated over a decade ago saying I am the only girl he loved. I don't like or care about this dude. Should I tell my boyfriend I received it and responded to it politely?