Let me tell you that I've been and I'll probably be again someday in your shoes (I have bipolar disoder)
My first piece of advice is, don't involve with people until you feel less lazy and really start being active.
Now, of course your question is, how the hell can I motivate myself to move around and be more productive?
Well, I'll tell you about what worked for me:
Watching LOTS of videos of Jordan Peterson, Richard Dawkins and Joe Rogan (JRE is a really about-everything show and from time to time they talk about depression, suicide, obesity, etc).
It's as if little by little, those videos and words filled me with energy so gtfo of my bed and start moving at least.
To finish up, I'll paraphrase a part of one amazing speech by Jordan Peterson:
"How do you get out of the depression zone? Well, first off, put your back straight. Secondly, look around you and you'll see there's chaos. Thirdly, how do you make this chaos disappear? Well, start by tidying up your room. That will make your surroundings look more beautiful and then you'll see the rest of the chaos better and be able to solve everything little by little. No one is actually gonna help you. It all starts with YOU."