This tando dog showed up out of nowhere

I was chilling in a park when this tando dog showed up out of nowhere and started staring at me. I gave him pet and I know you should not look them in the eye and slowly blink. So I did that as well. Then he started pressing up against me really hard. I gave him another pet and whenever I would stop he would give me this pitiful look, so I had no choice but to keep going.

His tail didn't wag even once. Am I misreading the signals