Mate, the only thing stopping you going out and walking, is YOU.
If you need milk, bread or similar, you must have to go out and get it - walk to a shop a bit further away and just take in your surroundings. The excercise and fresh air is a great way to free your mind and rationalise problems.
Dont let you stop you!
I do not wish to presume to be able to solve your problems, as I do not know you, or your situation, in the slightest. What I do know though, is that staying in by yourself is the wrong way to overcome this difficult phase in your life.
I GUARANTEE that if you go to your local college and check, there is courses that you can attend via a grant - this will give you the much needed interaction and company. I do not think that a solitary home study course is the way forward, but the very best of luck if you do push forward with it.
Take things slowly if you do go to college and do not try to rush into friendships, as the best ones are definately worth waiting for.
You will be all right mate, the fact that you are asking questions on a site like this shows that you have a good awareness of your situation and that is the first true step towards recovery.
If you can be arsed to log on, you CAN be arsed to go for that walk and build up slowly - small steps at first and set yourself little goals to achieve (like an extra mile each week fro example).
You must learn to appreciate and like yourself, in order for others to see the real you.
You CAN do this - dont give in!
Log back on and tell me if you took that walk and how good it made you feel.............