This dream may symbolize a desire for reconnection and support from past relationships. The gym represents a place of physical and emotional growth, and seeing your old trainer and lover there suggests a longing for their guidance and affection. The fact that he owns the gym may indicate a sense of ownership or control over your personal growth. Going outside and seeing him interact with others may represent feelings of jealousy or insecurity about his attention being divided. However, his statement about Cathy making him feel better and giving you a big hug suggests that he still values and cares for you deeply. The mention of an extra apartment may symbolize a sense of abundance or potential for growth in your personal life. Your friend leaving the apartment after seeing your brother may represent feelings of guilt or conflict about your relationships. Overall, this dream may reflect a desire for support and connection from past relationships, as well as a need for balance and harmony in your personal life.