How come some people aren't interested in my videos anymore?

This person that use to love my videos dont even watch my videos anymore. She comments on others videos and gets so excited. I used to get a lot of comments but I'm getting less. Nobody gets excited anymore. I used to get like 100-4k views and I struggled to get more than 70. It hurts me when she watches the others videos but not me anymore. I watched her videos. What give! Its so disheartening and I gave up making videos.