slightly confused

Claudia
Hey guys, 
So I've been texting this guy and we've been chatting for a while now. When we first started chatting, we both agreed on this being a no feeling, just sex type of relationship. Now however, it somewhat feels like a relationship based on the stuff that we do when together. For example; well go out, hold hands and talk as if it were a date. He wants me to meet his dog which although not serious has me a bit mind boggled. He did tell me that he was talking to another girl, however when he told me he asked if I was jealous or not. ( 
I'm somewhat) He will tease me about how I say certain words because Of the way I mispronounce some words, but he will ask what my guy friends say if I'm texting them in front of them, he'll even look. I understand if I'm overthinking this, but Idk, i just don't want to fuck this up. Sorry for the long read!