Thread:Benspider/@comment-29421682-20171205195549/@comment-29421682-20171209185513

Because, even though Blossom has superpowers, Peter won't allow it because of his moral conscience, and his unwillingness to let his double life harm those he loves most.

I know that Peter does get together with M.J. in Torment, and this, in retrospect this is kind of just a cop out to get him out of the relationship with Blossom, but it's the best, logical explanation I can come up with.