What should I do to change my attitude in front of my crush??

Someone on here gave me the tip that if he likes you, he will understand that you are just nervous around him and he will even think it's cute. I was doing the same thing with the girl that I liked - saying really stupid things when I was around her because of being nervous. I am pretty sure that she knew I liked her because she would laugh even though the stuff I said was totally off the wall or crazy. However, if the stuff you say is really rude and hurts people, he may tend to stay away from you in order to not get hurt. I would suggest trying to just enjoy yourself and have a good time while you are with him. The hurtful comments come from insecurity. They could also indicate a bit of anger or resentment. Are you feeling insecure because you're not sure whether he likes you? If so, maybe try flirting with him instead of making rude comments. If he likes you, you may get an opportunity to find out this way. However, if you continue to make rude comments and he is not into you, you may push him away from you. Hope this helps!