I have feelings for my best friend, but she is gay and I don’t know what to do?

Just accept the fact that you may not be able to date her. It does suck, but it can happen. Continue to stay friends with her, but try to save those feelings for someone who can feel attraction to you. Don't try to convince that she should like you as well, that is just not good at all. Just save your feelings for someone else, who can fall in love with you. Try to find her, instead of trying to get with someone who isn't, or can be attracted to you, it does suck that you are going through this, but accept the fact, and find someone else.

Talking to her could help just to get it out there even though it’s not a possibility. It’s easier to move on when you are honest and share. It’s very hard to do that though. If you don’t want to you can also just try to move on. This is also difficult but overtime will become easier. Goodluck! You’ve got this, just keep working on it and I know it will be okay. Your friend will hopefully be understanding and supportive until you feel that you can move on and find another amazing person. It will happen with time.