Yes, I believe that these are all signs of depression, and that staying inside to watch tv, sleep, and use the internet are ways to cope with depression and feeling alone. I think that if you try exercising either at a gym or in your own home, you may start to feel better and not want to be a vegetable as much. Try doing sit-ups, push-ups, running in place or around, or even yoga to get yourself moving. If you have an xbox or a wii, try just dance, zumba, or wii fit. I am always here if you need anything.