[AA] Imaginary Friend Vanishes when making real (Space issue)

I made a friend as a teenager and everything seemed fine, but later he appeared among my friends and I got the message “familiar face, but I can't remember.” But in the relationship, it says on the Sim's profile that he is now a friend, and the one who appeared second in the relationship says that he is my imaginary friend and no one can see him except the Sim who made him a teenager, but he builds relationships with them. I also tried to add him to the family, and I can't control him, but the details are falling apart. Now I have two Sims, but the second one is useless, as if he were imaginary. Maybe this will be useful to you... He is invisible to others, but communicates with them.