The Trevor Project is a nonprofit organization who provides lifesaving and life-affirming services to LGBTQ+ youth.
When you visit their site and http://www.thetrevorproject.org you will find the lifeline phone number 1-866-488-7386. They also have an online messenger that you can use to chat with someone and you can text START to 678678.
The Trevor project has provided services to thousands of youth. You can see some of the topics that are frequently asked about on thier FAQ page.