He accused me of perving..

Today SO and I were in the car together.. now he has done this our whole relationship and has self confidence issues. It is a boiling hot day outside and there was a male (to me he looked about 12 as I didn't have any glasses on) who was wearing a black sweatshirt and trackies and was running.. now this was so innocent and all I was thinking was that this man must be scorching it's so hot! Then he says "have a good look?" To which I jist said wat I wrote above and he started driving all crazy in MY car and telling me that I am just denying it cause I got caught. He then tells me that i dont get enough at home so he doesnt blame me for looking at other guys and then i ask what he wants from me to which he says my girlfriend not to look at other guys. I don't know what to say to get him to know I wasn't perving?? 😩