I come back to my original comment - why did he have romantic interest in a 22yr old? Theres A LOT of women out there who would be vastly more compatible with him due to being in a similar stage of life.

And, moreover, if he already knew her, he should have been able it intuit a) if she was interested and b) what her character is like - is she the sort to try to actively shame people.

I really hope your son does deep introspection as a result of all of this, rather than blaming her, women, or an entire generation.