Since you already know he likes you back, there isn't a lot of risk involved, so make it fun. Music can help you do that. I suggest making him a playlist of songs that remind you about him. Borrow heavily from Spinditty's "Positive Vibe Playlist: Happy and Uplifting Songs to Put You in a Good Mood," because this list of songs probably captures the top-of-the-world way he makes you feel (and the way he feels about you too, according to his friend): https://hubpages.com/playlists/Feel-Great-Playlist... You might include a special note about why each track is relevant. Make the last song your "ask out" song. I like Kelsea Ballerini's song, "Dibs" (2017) for this purpose: https://www.youtube.com/watch?v=e3lCzEOy5xs or a classic tune, "Can't Fight This Feeling" (1984) by REO Speedwagon: https://www.youtube.com/watch?v=zpOULjyy-n8.