Why do people leave my life because I can't handle my anxiety?

not everyone have the patience to deal with people who have issues, but keep in mind that even if you had no problem that kind of people would leave you once you need their help so they're just going to be fake friends

Every individual wants only those persons around who tend to remain happy most of the times. If you can't handle your anxiety then it shows that you aren't confident enough to tackle your problems. That's why people prefer to avoid you.

When you can't handle your anxiety, chances are you're taking out a lot of that stress on them. Anxiety is difficult for you to deal with, yes, but it also puts a lot of strain on the people around you.

Because spending time with someone who has anxiety is stressful. Some people do not know how to handle it.

That means that they weren't caring enough, and don't worry, you'll have better people in your life as time passes. People can leave you if you're too negative about life and always talk about it with them. Try to swallow and forget about it and look on a brighter side of about your life as you talk with them, that may help your case. Don't forget, you, and only you can overcome your anxiety or anything negative in your life. Friends and other people are there to help you or comfort you if you ever need it.