I do hope you're feeling a bit better now OP. I went through a similar experience...I found that I just didn't have the energy to reply anymore and felt so bad about it.

I've used that down time to slowly build myself up again, do things I enjoy.

One of the hardest things I've had to do is forgive myself...for everything. Because I would torture myself over things I did because I was depressed...and it only got me in a deeper hole. I'm only human, one who was going through a tough time and will be stronger for it.

Don't give up OP, you're worth holding on to.