I need some help with coming out

So next week I’m going so see on of my best friends and I’m planning on coming out to him. I have situational and social anxiety so just thinking about makes me really anxious. I know he’ll except me but I just don’t know how to say it. We haven’t seen each other in a year and a half. So I’m panromantic apothisexual and a Demigirl. I’ll link the wikis.