How to handle this girl who happily takes freebies from me and lately doesn't bother thanking me?

Your clearly too nice and that's a good thing but i can also be bad as many people will take advantage of you and walk-over you as the friend above is doing right now. If i was you, i wouldn't stay quiet, just tell her you are busy and no longer have time to burn the c.ds for her anymore. Be nice and polite and hopefully, she'll be understanding, if not at least you now can see her true personality. Good luck....p,s you really shouldn't listen to music....it messes your head up!