One way it helps to be an older person like me is that there is a lot of real-life history to draw on. I sometimes get discouraged about something, but then recall that those fears I worried about the most and thought were the most hopeless, turned out different than I ever could have guessed.
One was that I married an older man and was so dependent on him I panicked at the idea he would surely pass away long before me, inevitable! Little did I know that by the time I was forty, I didn't even love him anymore.
Another was when I thought I was stuck in my minimum wage job and just couldn't get out of it, so depressed I would live out my life in dead-end poverty. Then the computer chip industry came to my town, and I had a big step up.
Another thing that happened is that the county decided to take some of my land, but they had to pay me a tidy sum for it. I was so angry at first, but I used the money to upgrade my house and take a vacation I never thought I could do.
So, I'm just saying I try to recall those events when I get discouraged and can't see how things can change. You never know what's coming around the corner.
Just one more thing, if you could have a good relationship with your T, he could possibly be a supportive person to help with your despair. One of their purposes as a therapist is to offer a healing relationship, as well as logical discussions.