I ran into an old boyfriend 30 years later. the love of my life, that did not work out. He didn't recognize me because I had gained so much weight.
Dreams about running into an old lover often represent a desire to revisit the past and rekindle a lost connection. In this case, the fact that the old boyfriend didn't recognize you may suggest a fear of not measuring up or feeling inadequate. It's possible that the weight gain in the dream could represent this feeling of inadequacy or self-doubt. However, it's also possible that the weight gain represents a physical manifestation of the time that has passed since the relationship, and the idea that both you and your former partner have changed and grown in different ways. Overall, this dream may be reflecting a longing for closure or resolution with regards to the past relationship and the emotions it brings up.