How do I move on from my unrequited love for my roommate?

I met my roommate our freshman year of college, and I had/have a crush on him. I tried asking him out a couple times but he's made it clear that he's only interested in us being friends. It's been 6 years since then, and we've been living together for the last 3 years, and it's only gotten worse, especially now that it's just the two of us and my dog. It feels like we should be a happy little family. A few weeks ago I started actually trying to move on instead of just vibing with it, but it's hard. I'm used to treating him, whether it's little gifts or I'll make us breakfast, I helped him help his parents move, but I'm trying to realize that I'm not getting and will never get the same effort from him. I deserve more, I just don't know how to be "just friends" with someone I'm this interested in