You state the problem very clearly, and the fact that you can do so really shows that you are very much on the right road. Many don’t even get so far.
The whole problem of our life was neatly expressed by John the Baptist when he said (John, chap 3, v. 30) ‘He must increase, but I must decrease.’ This you have realised. But you are expecting it to happen suddenly: and also expecting that you should be clearly aware when it does. But neither of these is usual. We are doing well enough if the slow process of being more in Christ and less in ourselves has made a decent beginning in a long life (it will be completed only in the next world). Nor can we observe it happening. All our reports on ourselves are unbelievable, even in worldly matters (no one really hears his own voice as others do, or sees his own face). Much more in spiritual matters. God sees us, and we don’t see ourselves. And by trying too hard to do so, we only get the fidgets and become either too complacent or too much the other way.
Your question what to do is already answered. Go on (as you apparently are going on) doing all your duties. And, in all lawful ways, go on enjoying all that can be enjoyed—your friends, your music, your books. Remember we are told to ‘rejoice’ [Philippians 4:4]. Sometimes when you are wondering what God wants you to do, He really wants to give you something.
As to your spiritual state, try my plan. I pray ‘Lord, show me just so much (neither more nor less) about myself as I need for doing thy will now.’
From The Collected Letters of C.S. Lewis, Volume III
Compiled in Yours, Jack