There is a place and a time to chat with someone ..
People who are working and you just met them will normally will not give you your number because they don't know you .
It has nothing to do with your illness it's has to do with common sense .
Woman and I am sure some men are not so freely at giving there personal phone number to a stranger that they just met .

Did you ever think maybe they had a b/f and when guy hits on a woman and ask for there number it's because he wants to call for a date . Just because you go up to someone with a pure heart dose not mean others welcome it because let's face it they don't know if your a nice guy or not even tho you are they don't know it they just met you .

If your looking for friends then join a group and then you will find people who are looking for what your looking like here is a great place to meet friends .
If your looking for people face to face then join some group , what do you enjoy doing ? Cooking , hiking , art find out your hobby and the rest will fall in place . But please don't blame it on your illness .

The mall is not a great place to meet friends people are rushing to get to one place to another , find a place where people are not rushing around like a park .
Where I live we have a dog park where you have your dog run around and people talk to each other now that would be a place . If you have a dog check your town and see if they have one .