I met someone that finally understands my BPD, but I’m already having fears of abandonment

So I met this women on some discord server, and I’ve more or less know her about 3+ years, it’s just not until recently that we started talking and in less than a month, we’ve become really close and share just about anything. She lives where I have a lot of family and visit pretty often, so I told her I’d be interested in going out and she agreed, but even though we’re very open and share all our feelings, I get scared that one day she’ll have enough of my problems. I already showed her a bit of my alcoholic side and she was very understanding, but I don’t know, I’m so scared that she’ll become overwhelmed. I’ve never met someone as caring and understanding as her and so more than anything, I really don’t want to lose her. I just don’t know how to remain calm and not freak out, it’s to the point where I get terrible anxiety because I’ll mess up