I'm glad you are looking to God's Word for counsel. He are a few verses you might consider in light of your question:
Ephesians 5:3 But among you there must not be even a hint of sexual immorality, or of any kind of impurity, or of greed, because these are improper for God’s holy people. 4 Nor should there be obscenity, foolish talk or coarse joking, which are out of place, but rather thanksgiving. 5 For of this you can be sure: No immoral, impure or greedy personsuch a person is an idolaterhas any inheritance in the kingdom of Christ and of God.[a] 6 Let no one deceive you with empty words, for because of such things God’s wrath comes on those who are disobedient. 7 Therefore do not be partners with them.
8 For you were once darkness, but now you are light in the Lord. Live as children of light 9 (for the fruit of the light consists in all goodness, righteousness and truth) 10 and find out what pleases the Lord. 11 Have nothing to do with the fruitless deeds of darkness, but rather expose them. 12 It is shameful even to mention what the disobedient do in secret. (In other words, we're not even to mention acts of sin, let alone participate.)
1 Thessalonians 5:22 - Abstain from even the appearance of evil.
Philippians 4:8 - Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable--if anything is excellent or praiseworthy--think about such things.
(We're to dwell on those things that are from God and not spend our time thinking about evil, including the homosexual lifestyle. Would your presence at a homosexual wedding focus your mind on what is true, noble, right, pure, lovely, and admirable, or would your mind wander into the sinful behaviors you're witnessing?)