am I in love or just lonely?

I think I'm falling in love with my best friend but it's hard to know because I love her a lot obviously but I've never been truly in love so I'm not sure if it's that or if I'm just getting lonely and I'm projecting. Like, I think she's lowkey the most beautiful girl ever and I love everything about her and can't imagine my life without her and have definitely been having a shit ton of sex dreams about her but like... I mean my brain could just be making that up right??? I'm just confused and sexually frustrated and idk what to make of my emotions