That feeling really sucks. Wouldn't it be nice if they would call so you could cry together?
I miss my ex every day. I always feel like calling her. It's a horrible feeling when we realize they are no longer there for us.
There is a voice in your head that is telling you what you should do. You just have to be brave enough to listen. Some call it God, some call it your gut feeling or your higher conscience. Whatever it is, it is a part of you, listen to it. Love that voice because it is you.
I do however would like to point out the difference between missing an ex and missing someone with BPD. In regards of the topic, doing something drunk is never wise, neither getting drunk to forget the sorrow or become more talkative.
Stay strong sandworm