The shirt originally said, "Some people are gay. Original pin: Get over it." They were made as part of a demonstration for gay rights in the UK. Sir Ian McKellen has been an outspoken advocate for gay rights.
ALWAYS be confident in your decisions. Live life for you. If someone doesn't like it i guess they don't have your best interest in mind. only you can make the decisions that will change your life into what you want it to be.