Hi Dave ~~ I'm so sorry you're feeling so down. I can totally relate. i've had depression since I was a child -- so it's been many years. I'm taking an antidepressant for it, and it makes all the difference in the world. I feel MUCH better now.
You're right, that people DO let us down alot. I guess that's why I've lowered my expectations -- if I don't expect much from people, I'm less likely to get hurt. Also, since my husband died, my friends all dumped me, so I don't have to worry so much about people letting me down -- I don't see anyone! LOL
Have you gotten any treatment for your depression? I've been in and out of therapy for years, and I have found that talking to a counselor DOES help. Many times there are "buried" reasons for our depression, and talking to someone helps to bring those things out. We may not even know what's bothering us, but talking to someone usually can turn the light on.
Don't hesitate to keep talking here -- we'll always listen. And if you feel like talking to someone, you're welcome to message me. I wish you the very best. God bless & take care of YOU. Hugs, Lee