I had to look up demisexual. I’ve never heard that term before. Do you feel an emotional connection to him? And I’m wondering why you said yes to a relationship on the first meeting if you didn’t feel chemistry? It sounds to me like you jumped in and said yes before deciding for yourself whether you really were completely interested. Chemistry is either there or it’s not. It cannot be fabricated or develop later. Same with love. After a year together you usually know whether you truly love someone or not, even if it is just once a week seeing each other. Lots of people can treat you nicely or respectfully, but if he doesn’t fully do it for you to feel you’re in love, what’s the point? Eventually you’ll break up because you know the chemistry’s not there. And you initially felt let down when you first met him, then sparks were not flying for you during the honeymooon phase as they should be. My main point is that if you never felt the chemistry in the initial stages, it won’t develop later. I get the sense you fell into this relationship vs fully evaluating and deciding that this guy is right for you. Seeing one another more won’t make up for a lack of chemistry. And I don’t think BPD would interfere with falling in love with someone though I don’t fully know.