In a similar situation, being in love with an addict. She's a different person when she's sober. I'm guessing that the same is true with you.
Everyone in my life tells me that I'm better off without her. I feel alone as well. I can't tell you what to do. What I'm doing is taking some time to myself, and focus on working on me, and giving her space to recognise that she needs help. I've tried to give her love, and space to recognise that she has an issue. She knows that she does... when she's sober. The only thing I've found that works so far is to stop enabling her addiction. This looks different to everyone. For me, it means walking away from her when she's drinking. I say 'You're an adult. You can choose to drink. But I am too, and if you choose to drink, I choose to not be close to you. When you are ready to get help, I will be here, but I can't pretend any more that what you are doing is ok.'
I hope this helps. It sounds like you are on the right track with your steps. Keep taking your inventory, and be strong.