How Should I Respond to Someone Who Feels Invalidated by the Christian View of Sexuality?

Questions about how to respond to someone who says, “But this is who I am,” and who feels their existence is being invalidated by the Christian view of sexuality and whether Paul was wrong to encourage Christians to remain unmarried because “the time was short.”

• How would you respond to someone who says, “But this is who I am,” and who feels like you’re invalidating their existence when you explain the Christian view on gender, sexuality and lifestyles?
• Considering how long it’s been since Paul wrote 1 Corinthians, was he right to say the time was short and to encourage Christians to remain single rather than get married and build Christian families over the centuries?