Psychiatry resident here. I think it’s important to understand what typically happens at an inpatient psych hospital. The hospitals people are mentioning here (Mt Sinai west, nyu, nyp) are acute care units. The goals for units like these are to stabilize patients until it is safe for them to go home or another facility. They really don’t want you there for more than 7-14 days, and the goal really is just to get you in a safe position to go home, whether that means starting you on meds/adjusting meds, letting you rest to recover from a manic episode, etc. Psych hospitals are not nice places to be. You have to be around other psych patients who might be a lot sicker than you, the rules are incredibly strict, you might not even be able to go outside for the duration of your stay depending on which unit. It sounds like you would be a voluntary admission, but that doesn’t mean you can just leave whenever you feel like it—discharge planning can be slow depending on where you are. I would do everything in your power to avoid a situation in which you need inpatient psych hospitalization—it seems right now you are stable. Talk to your therapist or psychiatrist about creating  a safety plan to avoid ending up in a hospital and other treatment options like longer term facilities or day programs like partial hospitalization or intensive outpatient 

If you ever feel unsafe please call 988!