Yea! I know exactly how that feels, I was there myself quite recently, it's a horrible feeling. Have you got any other friends, or family that could help you out?
Even if it's just having a chat and spend some time with you, I know that would have helped me through that bad spell I had recently, but unfortunately I don't have that, since my wife passed eight months ago, and her family have boycotted me altogether. (Long story)
Try to think of something positive and aim for that, I always try and find one good thing in every day.
Get out of the house, go for a burger or coffee, anything to change your depressing environment, get amongst people, even if means just sitting watching them.
I forced myself to do that, and surprisingly it worked, give it a go, what harm can that do?