Is it weird if...

Is it weird if I have a boyfriend but I still fantasize with being with a girl in a romantic way? I want to hold her hand and kiss her cheek, but I don't feel the same with my boyfriend or any guy... Am I a lesbian in denial? Am I with him just to fool myself and society? I was questioning this before we got back together, but he was really insistent so I agreed. I also consider myself demisexual but I don't feel sexual attraction to him but I do to girls ┗( T﹏T )┛