Lonely - anyone else struggling with going out, general mobility, or depression?

You do sound depressed, I understand you being reluctant to take more pills, having just come to the end of treatment I never want to pop a pill again. 
I think theres a few things going on here. After all, we are all given a rather grim outlook so whats to feel cheery about? 
so , for both physical and mental reasons you dont really want to go out . When you snuggle in your P Js , do you feel any better? 
How about a challenge of one thing a day? A 100 metre walk one day , trying to go obe bus stop the bext? I dont know where you live so its hard to be specific. 
Then theres finding things to do indoors. Learn a musical instrument? Learn a foreign language? 
do you have friends and family to help? I assume you arent in paid work right now, but how about volunteering? 
take care and good luck . 

Are passionate about anything like fishing, cars, cooking, movies etc ? I'd try and rekindle that a little at a time. Volunteering sounds like good idea if you can get a lift.

Otherwise ( A bit contentious here) get a little angry, not with friends or family, but with the crappy hand we've been dealt. Anything to get a few juices flowing again