Spider-Man and Jean Grey's love story is likely just beginning in the MCU.
After MJ learns that Spider-Man is Peter Parker, she tells him, "I don't love you because I don't know you," signaling the end of their relationship and Peter's need to move on.
Meanwhile, Jean Grey is completely alone. In the climax, Peter tells her, "I'm here for you."
That final moment feels like the beginning of a brand-new journey for both characters.