I’m just not a relationship person
Similar to the “I’m not looking for a relationship right now” excuse, but different because this guy is saying he will never want a relationship. And if he says this, you can bet he got burnt. But, again, our drive for pleasure is stronger than our fear of pain. Even a man who’d been cheated on a dozen times couldn’t walk away from a girl he felt gaga for. So, if he pulls this line on you, than clearly his anticipation of being happy with you, is smaller than his fear of being hurt. Translation: he doesn’t like you much.