I'm going to use a mobility aid when I don't need one
Why would you want a mobility aid if you don't need it?
People just don't get me. I need this to feel secure so I can interact with strangers.
There is no reason for you to use a mobility aid if you do not need one. It makes sense that it may be a way to help you if you are having mental issues, however dig deeper into that. Maybe there is something else you can do to feel more secure around strangers.
You are so ignorant. It's all in my head. You don't know what I feel and what I need.
It must be painfully difficult to have to falsely present yourself as disabled to feel comfortable around people. You should seek counseling to help you learn to accept yourself and feel at ease around others. When people find out your not disabled, they'll think you're trying to manipulate them.