I am gay and can confirm that it is not a choice and cannot be changed. A lot of teenagers try heterosexual dating only to discover that sexual interest in the opposite sex is not there. Also, as a fanatical tennis player, I can confirm that there are many gay men who like and play sports. There are gay sports leagues of all types and an international olympic-like event held every 4 years called the Gaygames.

I think it is very important for parents to be understanding and to continue to emotionally support their gay children in their endeavors. Encourage him to date and to continue to refrain from alcohol and drug use. Society is rapidly changing in terms of acceptance and now marriage and parenting are options for gay men.

Also, I was raised Catholic and left the church for many years. Recently, however, I have found a parish in my area - not the closest to my home but close enough - that has an LGBT support group. I have been going and find it to be helpful. I encourage you or your son to research local parishes for similar support groups. If you have questions, feel welcome to PM me. All the best to you.