Hippo, I don't think it's anyone's place to tell you here whether or not you're in an abusive relationship, especially just based on these couple of details. Different relationships have different dynamics, and if yours is genuinely working for you and you're both happy with it, then that's great.
However...
I can't help feeling that there has to be a reason that you're posting here. And I have to say that it feels all too familiar to me. I was in an abusive relationship for many years and I often had the worry you seem to be expressing here, i.e. 'If people heard about this aspect of our relationship, they'd think I was being abused, but...'. I always had an excuse for him in my head.
I knew would be appalled if they heard him call me a cunt every day, but 'that's just the way he talks'.
I knew they'd be appalled if they heard him making fun of me, but 'that's just his sense of humour'.
I knew they'd be appalled that he didn't ever want me to see my friends or family, but 'that's just him being overprotective'.
I knew they'd be appalled if they knew he'd called me a fat bitch and thrown things at me, but 'that's just how he gets when he's angry'
And so on. For years and years. I hid all of that because I knew, deep down, that it was all so very wrong, and that if my friends and family heard it all then they'd be turning up at my door and packing up my things for me. One time I did break down and admit a few things to a friend (after being subjected to a four-day silent treatment from him) and the look on her face said it all. Afterwards I begged and begged her not to judge him and just to forget it, which she grudgingly agreed to do, but I knew she could never see him in the same way again.
Basically what I'm saying is, the specific details in your post don't necessarily concern me, but the fact that you posted at all does. I'm possibly over-identifying, but it just feels very familiar to me. Please do take the time to ask yourself whether you're really as OK with this situation as you say you are.