None of those women were being unfriendly at all. In fact, they were being more friendly than they may have even been comfortable with, because it's easier to be friendly than to risk being labeled a b**** and risk to wrath of a random stranger. Especially while working.

I've given out fake numbers before... simply because I was isolated and worried about the backlash if I was to say no.

Don't blame your mental illness for the lack of responses. They have no idea about your health issues.

As the posters above have said - approaching women who are trying to do their job just isn't polite. Approach women in locations where you have a chance to meet more than once, and that way you don't need to place them in the awkward position of giving you their number before they know you a bit.