^
This may be a litte blunt.
My advice:
1. Get social. Talk to people, even if it's just saying hi to someone you don't even know when you pass them. Just talk to people.
2. Music can be the most importnt thing to you without you centering your life on it. Develop new interests, even if it comes from the music. for instance what I did, I like a lot of music from the 60s, so I started to look into and learn about the 60s. Maybe you could learn about how stereos work or something, that way you have the safeness of the music, but you also have another interest.
3. If it's that important that she knows, tell her. If you don't think you can tell her, then don't.