I can so relate to this. I feel invisible the majority of the time. People cut me off when I'm speaking as if I wasn't even there. Or just never respond to me. And I'm always being told I'm 'too much': too emotional, too critical, too 'dramatic', too much of a pessimist. I tend to avoid most people as a general rule. It's the only way I manage to stay sane sometimes. It can get lonely but I'd rather spend my time with people who actually care about anything to do with me than with no one. And those people are rare in my life.