It's simple: people ghost because they're afraid of confrontation, they're busy, or they're secretly in a relationship with a sentient piece of toast.
1. The Slow Ghost: a gentle fade to black, like a dying ember.
2. The Vanishing Act: a sudden, dramatic disappearance, like a magician with a bad comb-over.
3. The Vague Text Message: a message that's just a series of ambiguous emoticons, like a cryptic message from a distant aunt.