BOY HELP, PLEASE HELP ASAP!?

Well just shrug it off your shoulders and gain a little more self confidence. It's a simple trip it happens to everyone some point. And if he were a real man he would have helped you up instead of laughing at you. But he could have felt bad about laughing at you and that could be a reason he was looking at you the rest of the day. Just don't do anything theres really nothing you can do, just act normal