So long post warning. sorry! But pleaseee help!

I’ve known my best friend for about a year now. We met in June of 2019 and spent an entire summer together. Literally every single night and he even slept over at my house. We became extremely close but there was always like a lingering awkwardness because everyone around us made us feel weird for being so close. We always laughed it off and made jokes about it. These past 6 months we’ve gotten even closer which i didn’t know was possible. We even started sleeping in the same bed when we stay at each other’s houses, we hold hands and go on “hangouts” which are like glorified dates, he sings love songs to me, we “have a song” together, he even wants to get the same tattoos his parents got together when they were our age..

Now here’s where i’m confused. That very obviously sounds like we’re into each other, and in all honesty i’ve kinda been into him for a long time now but i tell everyone i’m not. But as time goes on it seems more and more like he might feel the same way but we continue to talk about how we don’t have feelings for each other and we want different things/ we know what we want. A couple months ago i had taken a picture of us that made us look super coupley (not with ill intentions, i just liked the picture) and he told me it seemed “too relationshippy”. I’m just confused because he initiates EXTREMELY relationshippy type stuff and he truly enjoys every moment of it but when i play into it he pulls back and says it’s too much of a relationship typa thing. It’s like he keeps pushing me to admit that i have feelings first but i refuse to admit anything before i know how he feels. Advice?

(for clarification were 17 and 18)