Is it possible to love someone more than you’ve ever loved anyone and not be in love with them?

I’m 19. I didn’t have the best family life growing up. I would say that I never experienced proper familial love and I don’t know what that feels like. I’ve also never had super close friends until the last six months, and I’ve never been in a serious romantic relationship. One of my friends who I’ve grown close to recently is constantly on my mind. I want to be around them more than anything in the world and their friendship is the greatest happiness in my life. But I don’t feel sexual desires toward them. I’m confused about my feelings because I’ve never felt love this strong before but I’m always thinking about them and they make me feel so seen and loved. I don’t really know what to do because this is the most important person in the world to me but I don’t know if it should be. But the thought of putting space in our friendship breaks my heart.