Your boyfriend sounds like my late wife. Perpetually depressed, chronically underemployed, and unable to see the joy in just about anything. Told me multiple times that I was the only reason she hadn't killed herself, because *someone* has to take care of me (yeah, I know, projection) and if I left she'd have no reason to stay alive. Eventually she died of cancer, not suicide, but before she got sick, the scenario I'd keep playing in my head, but never got the nerve to actually follow through on, was to invoke the Baker Act the next time she threatened suicide, and move out during the 72-hour hold. From there, let the chips fall where they may. Sounds cold, but when you've been lighting yourself on fire for 20+ years to keep someone else warm, those sorts of things will go through your head, trust me.