(borderline personality disorder)

I just had a fight with ny boyfriend. We were talking about something and we couldn't properly disagree so had a fight. Whatever. Shit happens. The problem is that we are both upset right now and i decided to end the call but at the same time my syptoms are becoming worse by the second. I feel scared that he wont message me. I'm currently blaming myself really hard and im having bad anxiety. At the same time i also dont know how to cope with being alone, im extremely  emotionally dependant on my boyfriend because the second that he leaves or we have a misunderstanding i fall into a void, just a void full of anxiety and depressive thoughts, i have no way of making myself feel better or doing something that can distract me for some time. Help.