This sort of behavior shouldn't be tolerated at any cost, as every individual got the freedom & right to lead a life of their choice. Hence, if any action is done to malign your name & character knowingly. Then, you have every right to sue those people to get what you deserve from the society.
I don't think that the following incident can hamper your life. But you need to be careful from future point of view, as any small incident in personal life can trigger the issue again. It is important to take positive steps in life, in case of confusion you can always take help of a legal...
There are some situations when money doesn't matter at all. However, technically those tickets should be yours. But do not worry. Keep your friendship alive forever. Do not let money matters come in your way.