Same-sex attraction is not a sin.
To be human is to have a disordered sexuality. You do. I do. Everyone does. We all have some manner of sexual drive that compels us to disobey God’s design for sexuality. But, while temptation is universal, it’s different from sin. Scripture tells us that Jesus was tempted in all ways as we are, but did not sin (see Hebrews 4:15). Sexual sin is giving in to that desire in either mind or body. Faithful Christian discipleship cannot avoid temptation, but it strives to resist and master it with God’s help. Doing so is not sin, but obedience and dependence upon Christ.
Many are indeed same-sex attracted, but live obediently within a Christian sexual ethic. It can be difficult, as it is for heterosexuals who are required to live in celibacy. Christianity requires that we each subjugate our sexual (and many other) desires to our faith commitment — and countless same-sex attracted believers do so willingly and joyfully.