Ok first things first my dear. I would like you to watch these three videos about validation empathy and listening. They are really short but they helped me really understand what to do.
Validation
https://youtu.be/DABarBuR2K4Empathy
https://youtu.be/1Evwgu369JwListening
https://youtu.be/FEvldkFkgscSecond of all I want you to do something relaxing like take a bath get some candles do some deep breathing. It sounds like your having alot of anxiety and that's not good for you sweetie. I can tell you are a sweet empathic person and just want to be happy and you want him to be at peace.
So after you watch these videos and do a little self care.
The next step is to write a script based off the videos. Brainstorm how you can try and empathize with him. Take the judgement glasses off and just see a very hurt and sad depressed man who feels utterly alone and doesn't know what to do. So of course having a drink might happen. He will do anything to feel better. And wouldn't you too if your emotions felt like 3rd degree burns all over your body? That is what they say it feels like when you have Bpd. That's completely understandable right?
So He's ignoring you now but that's not gonna last I'm sure. Your probably his only real friend. He's hurting real bad now and doesn't need to hear anything else about how he's effing up. Trust me he already knows and is feeling soo much pain right now.
You won't be able to solve his problems. And surprisingly people with BPD dont want you to. They want to be able to do it on their own. Your role is to come along side him and be the one person who will really empathize with him at this point.
If you can get to that place where he is feeling heard and loved... then you can began to brainstorm solutions with him as to what he feels will be best for him to do.
Oh just to clarify validation does not mean condoning or encouraging bad behavior it just means validating his feelings... .his emotions without judgement. The video on validation will show how to do it.
Also this is just the first step because these skills take practice. Try them with everyone in your life.
Also get the book "loving someone with borderline personality disorder" by Shari Manning. It's gold.
And last but not least Pray! Prayer will build empathy naturally in you.
Please please please take care of your self love first and foremost. Let me know if you need any more love and support. I'm here for you darling!