HOW TO BE ABLE TO GO ALONE TO THE GYM? PLS HELP?
You are not that stunningly important that everyone will stop what they are doing to stare. Get it into your head that you are just another person in the room.
Being confident and not give a sh*t is a skill you build over time. The more you become in shape, the more confident you will be. I would put on headphones and do your thing (it would probably be healthy just to make friends at the gym but I would never do that because Im not extroverted :P). FYI...your mind is tricking you, I guarantee they are not staring, and if they actually are, its probably not because your short.
You only think everyone will be staring at you, but truth is no one at all will stare at you, except maybe for any occasional freaks out there. Just go, you are making a thing out of nothing.
They won't be staring at you, when people are at the gym they usually don't pass judgement on people. They care more about their work out then staring at some one. Most people go to the gym by themselves, to they're alone too. Listen to some music and do what you usually do at the gym. Or make a new friend that can go to the gym with you.
You have to go to gym. because your health is so important.