As a child of God, whenever you have the opportunity to speak about homosexuality, don't beat around the bush. (Evil thrives when good people are too afraid to say the truth.)
Speak to them in love, but still show them from the Scriptures that what they are feeling is not from God because He clearly speaks against it. (Offer to pray with them to help them overcome the feeling.)
Don't stand by and do nothing while people are on their way to destruction; you have a responsibility to save as many as you can (Jude 1:17-23)
“I know that in some countries, the government has made it illegal to speak the truth as regards homosexuality. However, we have a greater government in Christ, and we must represent Him everywhere we go.”
Memorise: Wherefore putting away lying, speak every man truth with his neighbor: for we are members one of another. (Ephesians 4:25)