<human>: So me and we will call him Joe have been best friends for the past four years, i've known him for 9 years. This year our relationship took a sexual turn when we expressed mutual attraction to each other. Since then we have been having frequent amazing sex. It doesn't feel like just sex and its really intimate most of the time. 

Here is where I am confused:
We act as if we are together. We sleep at each others places, cuddle, partake in public PDA and are constantly together no matter what we are doing. When I ask what we are he simply responds that he doesn't know, and he doesn't want to know because this works. We both have been monogamous, though this never was stated. I have no idea what this means and I'm really confused because i'm in love with him. I don't like not knowing what this relationship is now or where it is going.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Best friend and I have been hooking up but acting like bf/gf. I'm in love and confused.