Would you attend your boyfriend’s ex’s wedding?

My boyfriend stayed close friends with his ex and her family after they broke up five or six years ago. He still brings her parents gifts on Mother’s Day and Father’s Day and hangs out with them and her brother all the time. It used to make me extremely uncomfortable but I’ve sort of gotten used to it. Anyway, his ex is getting married at the end of this month. He was invited, and her mom gave him permission to bring me to the wedding. The wedding takes place just before I move away for school so part of me would love to go just to spend time with him before leaving. But the other half of me still thinks it’s weird and awkward. Should I go? Is it not my place?