Oh sorry to hear you are feeling this way, it's not uncommon.
Some great articles on the internet about things to try to cope with burnout. MIght be worth a google, to see what the experts say about best strategies to cope with this.
If possible, it might help to cut back your hours a bit, or try a new dept/new area of nursing. Maybe homehealth or hospice for a while, if this is an option for you? Many hospitals have their own home health depts, so you could keep whatever seniority you have acquired.
Take as good of care your own self as possible, eat right, for real, eat fruits, veggies, plenty of water, avoid junk foods, etc. Exercise, even if it's just walking. Get enough sleep. Stay as fit as possible, strive for proper body weight, to increase your own energy levels and strength. If you can, maybe get a massage now and then, too. Spend at least half as much energy on your own self, as you do on other's needs.
Indulge in things that you do enjoy, as you are able to, whether it's going to hear a great band, or to a concert, reading an awesome book, having coffee or martini with your pals, whatever bakes YOUR cookies, do that. Force yourself if you have to.
Surround yourself as much as possible, with positive ppl, ppl who actually APPRECIATE you, and avoid whiners, they can bring you back down, even as you struggle to stand back up yourself.
As much as possible, with the energy you do have, try to make sure your various relationships with your family and friends are healthy, not draining you, and are being tended to. Easier to say, than do, but, IF there are other pieces of your life which are a drain, it can really snowball and seem even more overwhelming. Right now, you need all the support you can get, imo.
This last one will sound weird, and it might not work for you,
but, for me, i get a boost from doing volunteer work. I know, i know, most of us nurses count all those unpaid hours we 'donate' each week, as volunteer work,
but, finding an org or cause you truly passionately care about, and hooking up with them, even if you can only donate an hour per week, might give you more of a boost, a feeling of worth, a way to connect with others not involved in nursing, than you might expect. Worth a try. For me, this also helps keep nursing in more perspective, more in balance, than being my entire world. Hard to explain.