Hi Chris
I know I don't come on here much but this blog prompted me to want to reply, I hope you don't mind.
Since my son died I have read a lot about depression and mental health and have come to the conclusion that a good therapy is to talk openly about it, as you have done before and are doing here. I don't profess to understand your feelings and anxieties because thankfully I don't suffer but I do think it is good to talk to family, friends and even publicly about how you are feeling, in that way people can give you support. My son had thousands of on line friends, hundreds of off line friends and a loving family but he didn't open up, if he had done things might be different.
You've got lots of good friends and a wonderful family network who I know support you and are proud of all you do.
If you are being harrassed by online friends, just block them or unfriend them, don't suffer it, don't engage with them they aren't worth the trouble.
Sorry to go on but I just wanted to have my say, I hope it helps and I hope you don't mind me adding my thoughts.
Take care, Tony.