I think need to start reframing how you see things. Because you are catastrophising to a level that sounds just plain wrong, and likely to feed a cycle of negativity.
For example, your relationships have not been 'torn away', they are strong and enduring and it might not be too long before you can start seeing some people face to face, as well as unlimited contact by phone, online or even by old fashioned but surprisingly lovely letter.
You do not need to be 'imprisoned' - even the CEV are allowed out for daily exercise and to meet one person whilst they exercise. If you not going out at all, I would urge you to start, exercise and being in natural daylight aren't a magic cure, but the reason they are consistently recommended is because they have such a positive effect.
It's over a month until the anniversary, and the anniversary if the other side of the 21/02 announcement on future of restrictions and expected relaxation of some. The world could look very different by March. Dwelling on a date beyond that is just stoking up something that does not exist yet - you are creating a fiction of it that exists only in your thoughts. Noticing those thoughts when they happen, and consciously thinking that's ages away, stop and think of something else can do a lot to break this cycle of negativity
Please don't read all that as unsympathetic to how tough things can get from time to time. It's intended to be a reminder that you can change this. A little bit at a time.