No, he met MJ when he was at ESU. After he met Gwen and Harry.
Stan stated his intention was to marry Peter and Gwen, but she got killed instead because someone at management was uncomfortable with the idea.
Frankly, Gwen's death was when Marvel lost their balls. In a two-parter they killed off his love interest AND his archenemy. They shouldn't have stopped there, they should have continued with genre defying stories like that by never bringin Norman back and continuing to make huge changes to the series, changes that couldn't be undone just like that.