It is difficult to see how any part of “me helping a boy at college”
could be referring to “another girl.” Or did you mean the post I linked
to (I was mistaken – you only imply that you’re a girl in it)?
That one says “what I did,” which is also hard to apply to “another girl.”
As for why you shouldn’t grab the mitzvah,
it is no mitzvah for you to talk to boys.
(Rabbi Zecharya Wallerstein pretty much says so in a speech on YouTube,
although he’s talking about convincing girls that their
“helping their boyfriend with Yiddishkeit” is not a reason to
not break up with them despite the relationship being wrong.
Is he a more acceptable source for you, or only for another girl?)