It sounds like you're pretty deep into a manic episode. My last manic episode was about a year ago and I said the exact same things to my loved ones. Luckily, my parents are extremely educated on bipolar mania symptoms and got me back on my meds without a stay in the hospital. Unless you're a danger to yourself or others or deemed incapable of making your own decisions I don't think they can keep you. But if you're truly that worried I would check the laws for your state on involuntary committal and then make your decision. I know what it's like to be in your position and I think reaching out for help is in your best interest at this point no matter how scary it may seem. Good luck and sleep is necessary for some resemblance of sanity