It is kind of unusual for the boy in a case like this to be the one talking about how ruined he is now. If he really sincerely has that mindset I doubt he would have gotten so involved in the first place.
Meh, you just don't know.
My senior year in high school I got involved with an older married woman (she was in her early 20's at the time) that worked in a building with my dad. At first it was just her sneaking me kisses but eventually she invited me over to her house when her husband was gone and she had her way with me. As a high school boy who had only had sex once prior to her, I loved the attention of course. She was obviously trying to impress me sexually for some reason so she was willing to do almost every freaky thing my high school brain could think of, and early on I thought of a lot. It became a regular thing for months.
And I know what you are thinking, boo hoo me or this kid right? Well the problem is any woman willing to sleep with a younger guy who has little kids (and was married in my case and many of these teacher cases) has a lot of crazy in her. And for a young man that crazy is hard to handle.
In my case soon she started talking about running away with me (like the woman in the article) but then later she would ask if I would take care of her and her kids (me, a not high school graduate). She would complain about her husband and then defend him, she keep wanting me to meet her kids until she didn't. Plus all kinds of other crazy like showing up around my house when she knew my parents were around to sneak one in. Turns out she really liked/respected my dad from meeting him at work, and I think in a sick way she wanted to be part of my family and sleeping with me was her way to get there I guess. Eventually I got out of it by graduating and going off to college, but if I didn't eventually it would have been bad for me (and maybe her husband would have killed me or something who knows).
The scarring was a real thing afterwards. All of the crazy she dropped on me, and the situations she would put me in to get her fix really kinda screwed up sex for a while for me. In college, until my senior year, I purposefully tried to date and sleep with the craziness women I could. I dealt with so much drama, and put myself in many compromising situations, simply because of my expectations of what to expect in a sexual relationship. I became attracted to crazy and in a way it became a way to punish myself for the lingering guilt I had from the high school affair.
It took me months of therapy to unwind it all and learn to not only trust women again but trust my own judgement. Today I feel past it and am happily married, but my sexual encounters with an older woman in high school definitely left a mark. Sex is almost always great but crazy women is hard to deal with, and high school guys should be dealing with high school girl crazy, not "I am getting older and I have kids and I just want to feel young again" crazy.