He definitely must be going through something. I would offer support and let him know he can talk to you. I would straight out ask him if he's seeing someone or if he needs to be alone. If you feel like he's just stringing you along and doesn't want to be direct just end it. Also, alot of Leos love grand love gestures and like you said "DRAMA" in love. Maybe he just wants to tell you his feelings in person. Do you think the "it's complicated" means he's seeing someone else?