We are the ones with 'invisible illnesses'. They are every bit as real as a physical disability, or other organs/body systems not working.
You don't tell someone to 'man up' when they have diabetes, so why say it to someone who has a mood disorder?
I feel your pain! Sometimes I feel like I'm 'unworthy' of being helped. I try to remind myself that it's not my fault my brain doesn't work right, and there are tons of people out there who have no issue helping people like me, like us.