You're welcome. I really hope I've helped you and if you have any questions then let me know so I can explain myself better.

Take care and thanks. The best thing that you can do I think is to just relax and be natural. Clear your mind. Pay attention fully to what people say too. This will help you be more natural too when you can practice and learn how to respond to your surroundings better. The only way to accomplish this is to be 100% natural with a clear mind. The only way to achieve that is through discipline, courage, and kindness.

I hope this helps.

*Edit*: I don't know if this applies to you but I had to learn how to pay more attention to other people and to my surroundings. I had to learn how to put myself in other people's shoes and not think so inwardly about myself all of the time. Also it is impossible to know for sure whether or not you would want or are going to do anything. It's irrational. It's kind of like asking the question of, "Would I walk into a lightning bolt if it struck right in front of me?"... well obviously the answer is of course you would not because that would be absolutely absurd. Not only is it absolutely absurd but it is also completely irrational nor does it make any sense at all. That should be enough reassurance I think.

You could also use other examples to reinforce your mind naturally.

Like, "Would I walk into a burning building?"
"Would I stick my hand into the garbage disposal while it's running?"
"Would I start doing jumping jacks in the middle of my class room for no reason?"

These all have something in common with what's going through your mind right now. They are all silly and completely irrational so why waste time with them?

You're a good person so the answer is no, you would not do these things because they are completely ridiculous. In fact they are as far away from your true self as possible which is why you are having the thoughts in the first place. It's because you are a good person.