I would hope that we all attend church with the hope of being cleansed from our sins. My LGBTQ+ friends are not more or less in need of God’s grace than I am. Not sure what you mean by practicing, but yes, they should practice God’s love for others the same as we all should, including committing themselves to a loving, monogamous relationship with their spouse, the same as God prompts each of to such a commitment. I believe it has been our unwillingness to accept God’s blessing of same-sex marriage that has helped drive some of the problems gays have with promiscuity (keeping in mind that heterosexuals have almost as much of a problem with promiscuity). If same-sex marriage is disallowed, what is the motivation, within a moral community like the church, to resist promiscuous sexual relationships?
To give credit where it is due, though, there have been many same-sex coupes, even before marriage for them was legal, that remained monogamous and faithful to their partner.