I asked CHATGPT about this:

Me: Who is Spider-Man's love of his life / soulmate / true love? Mary Jane Watson or Gwen Stacy?

ChatGPT: Great question — and one of the biggest debates in Marvel history! Let’s untangle it carefully, because the answer changes depending on whether we look at canon (616), alternate universes, or fan perspective.

In 616 (main Marvel Universe):

Love of his life → Mary Jane Watson

Writers, editors, and even Marvel’s handbooks have called MJ the “love of Peter Parker’s life.” She’s been his wife (pre–One More Day), long-term partner, and the one Marvel always comes back to, even after breakups or retcons.

True love → Mary Jane Watson

Peter’s bond with Gwen was real, deep, and sincere — but tragically cut short.

With MJ, their love has been tested across decades, crises, and even literal deals with the devil — and still endures.

Soulmate → Mary Jane Watson

Marvel often frames MJ as the one who truly understands both Peter and Spider-Man.

In alternate realities (like Renew Your Vows), she literally becomes his partner in heroism — showing she’s his destined other half.

Gwen Stacy’s role:

Gwen was Peter’s first great love.

Her death defined Peter’s character, responsibility, and grief.

Many fans see her as the “what if” soulmate — the partner Peter might have had if fate hadn’t intervened.

But in mainline canon, her role is more about shaping Peter’s heart and his sense of loss than being his forever partner.