we need you (слэш)

Prompt? After waking up in the future in a SHIELD facility, Steve suffers a devastating mental breakdown and develops DID as way to cope. No one even realizes because no one can separate Steve Rogers from Captain America, which just makes it so. much. worse. for Steve, who spirals into depression when he realizes no one needs him and no one would miss him. Bonus if Bucky is the first to figure it out, either because he has DID as well, or just because he's Bucky.