Falling for best friend who might not feel the same..

A close friend and I have been friends for 10+ years. Over the last few years I have been feeling more than friendship feelings for her. She was with another girl but not public, but it didn’t work out. All of our closest friends are in WLW relationships so I feel like it should be obvious but idk. We’re very touchy with each other in private and public (physical touch is our love language), sleep in the same bed every night we’re together, talk nonstop, etc. I don’t know how to verbally tell her I have feelings for her and ruin what I feel like we have going if she doesn’t feel the same. She has asked me to move in and I don’t know what to do because I don’t know if I can do that and just stay friends.