Is it bad that I don't feel as bad about drinking if it's not my money?

I know you aren't supposed to drink if you have mental health problems (I'm diagnosed as BIPOLAR-NOS), but I love to get drunk and I used to get drunk at the end of every week, now I get drunk pretty rarely and I'm not spending my money on Alcohol (i just occasionally get drunk on my younger brothers alcohol, before this year he would drink more of my alcohol than I would, in 2 weeks it was over $50), so I don't feel like it's such a waste of money as I used to.