I can understand your ego being hurt, but the reason why it was hurt wasn't what he said or how he said it.
It was that you're own actions were shown to you without any buffering.
You're not his girlfriend, companion, or lover. You're his treetrunkbuddy. His sex toy. A willing replacement for his hand.
Your ego wants you to believe that you're more to him, but in reality you aren't.
You wanted to live in a dream world where this guy comes to your rescue by falling madly in love with you just because you agreed to treetrunk him raw for a couple of weeks. He'll realize just how important you are to him and how he doesn't know how he lived without you for so long....
But his willingness to hook up with other women and address you as his treetrunkbuddy is shattering the dream world that you've already set up in your head about how it's "supposed" to be.
You might have feelings for him, but your feelings are delusional at best.
I'm sincerely hoping that you can get help because from what you're sharing here, you're in a very unhealthy state.