Why are men so confusing?

Why does some men say they want to have a purely physical relationship and then treat you like you’re the love of their life and he thinks about your futures together every time he looks at you?

Like why does some men want to treat a girl like she’s his gf, but then doesn’t want to call her his gf?

Update: yes I would like a guy that say “it’s not gonna suck itself”, I wanted a purely physical relationship. I’m a nympho, I love sex, that’s why I entered into a purely sexual relationship with the guy I’m sleeping with. I’ve never said or acted as if I’ve wanted more than sex. My csp doesn’t sweet talk me, he in fact doesn’t talk that much at all, but he’s incredibly hot and I tell him that all the time so he knows I want to fuck him regardless of his feelings for me. Reason I’m mad is that I feel like he’s lying to me about not having feelings for me and honestly is incredibly important to me, plus I don’t understand why he would be lying about it.