I lost my best friend, my brother, my closest friend? (My POV)?

I would definitely suggest talking to him. If he is your best friend but you also have feelings for him, you are going to have to choose between friendship and love. Are you going to lose the friendship completely for a love you probably won't get, or are you going to accept that you and your best friend won't work as a relationship and ask him to just be friends? If you choose to still be friends, you need to talk to him, help him understand that you will always care for him as a friend, and help him understand that you still need him in your life. Hope this helps, and have a great day! :)