You sound like you’re hurting from your break up. I’m sorry! But worrying about how a hypothetical future-spouse might have a hypothetically gay cousin who proceeds to invite you to a wedding where your hypothetical wife wants to attend but you don’t… it just seems premature. You can’t foresee all the places you and a future spouse will disagree - even on your wedding day (let alone before you’ve even met the person!) Marry someone respectful and committed to seeking wise answers with you. Together y’all will figure out life as a team & as you go. Ultimately marriage is a leap of faith, trust, & love. There is always uncertainty about what life will throw your way and how life will challenge and change you and person you marry. You can’t see all that ahead of time. None of us can. But marriage is a wonderful adventure!!