1. I am going to repeat myself with what I have counseled you on myriad occasions.
2. There are numerous passages in the NT that explicitly (didactically) deal with the issue of homosexuality and which incontrovertibly denounce it as an abomination, immoral, damnable, etc. (Rom 1:26,27; 1Cor 6:9; 1Tim 1:10; Jude 1:7). This last text makes clear that the OT prohibitions against any/all forms of homosexuality and various forms of sexual perversion are NOT abrogated by the "new covenant" but rather are to be understood as examples for all ages.
Jude 1:7 (ASV) 7 Even as Sodom and Gomorrah, and the cities about them, having in like manner with these given themselves over to fornication and gone after strange flesh, are set forth as an example, suffering the punishment of eternal fire.
Sound exegesis of the various passages, both OT and NT which mention homosexuality are perspicuous in their condemnation.
3. You MUST accept that any that you choose to call "friends" and your "relatives" are embracing doctrine(s) and/or practices which are contrary to God's infallible Word. And in doing so, they MUST be considered unregenerate. This MUST demand of you that you a) distance yourself from them as they are darkness and of the Evil One, and b) debating with them concerning such things is futile, for their immediate need is the Gospel through and by which the Spirit works to bring regeneration so that they may, by God's mercy and grace, be brought to repentance and faith in the Lord Christ unto salvation.
Meditate on Paul's inspired words to the Corinthian church:
2 Corinthians 6:13-18 (ASV) 13 Now for a recompense in like kind (I speak as unto [my] children), be ye also enlarged. 14 Be not unequally yoked with unbelievers: for what fellowship have righteousness and iniquity? or what communion hath light with darkness? 15 And what concord hath Christ with Belial? or what portion hath a believer with an unbeliever? 16 And what agreement hath a temple of God with idols? for we are a temple of the living God; even as God said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people. 17 Wherefore Come ye out from among them, and be ye separate, saith the Lord, And touch no unclean thing; And I will receive you, 18 And will be to you a Father, And ye shall be to me sons and daughters, saith the Lord Almighty.