This question of Spider-man
of this of Spider-man, why does he estrange himself from his loved ones
and of MAry JAne, why did she get engaged to John, to make Peter Jealous?
Not really sure what you mean by the first question, but I guess to protect them in case someone finds out he's spider man.
As for the 2nd question, Mary-Jane didn't think of Peter as anything more than a friend at that point, and she was dating John.
I'm a leaf on the wind. Watch how I soar.