Orgasm, orgasm, orgasm.

So I've been hooking up with my friend for a while now, and every time we have post-sex convos he asks me "did you orgasm?" To which I replied with "I think so?" Now don't think that the sex is bad because it's the exact opposite, but I just don't if I have or haven't. He thought I did the last time as he was fingering me because he said my breath was short, my legs became restless and so on and so forth. But I don't think I had that moment where I was like I orgasmed. Is this normal? Or is it just me? I don't want my friend to think he isn't good.