Sex talk

So I had sex with my current SO for the first time. It wasn't bad and it wasn't good either, I couldn't really tell...I couldn't tell if I even came or not but he also didn't cum. I feel like he was trying really hard to cum but it just didn't happened. Sooooo the tf does that mean?? Mabey we aren't sexually compatible? Idk I still want to be w him either way but it's almost like an elephant in the room...