Dis-order means absence of order. Homosexuality was considered to be a “disorder” until about 30 years ago, when the social attitudes began to change.
You being friends with homosexuals (is it a sex thing or a gender identity with them?) is fine. After all, Jesus Christ did not reject the tax collectors and harlots, who by the standards of the day were just as bad.
The point is that the secular orthodoxy forced upon you at school and the new social norms of the mass media are putting you in a position of having to decide what is or isn’t real; what is or isn’t the truth.
Yes, you do love your neighbor, including those who are gay, or even those who are not your friends.
But, calling something disordered for what it is does not necessarily constitute hostility.
For thousands of years civilizations developed a sense of what is or isn’t ordered, what is or isn’t natural. Our society has turned much of it upside down in the last two or three decades. We now think that we are wiser and more enlightened than everyone who ever came before us. All the philosophers, scientists, saints of the past millennia are now considered to be useless if the present ideology disagrees with them. I don’t know if I would be all that comfortable with this notion. But, the decision is yours. Give it some serious thought.