Is it cheating if you're unofficial?

I’ve been seeing this guy for almost 3 months now and we like each other. We never had the “relationship” talk or talked about being exclusive but I have a good feeling that he wants to head that way.

Just out of curiosity, if I went on a date or kissed some other guy would that be cheating? I’m not interested in anyone else, I’m just wondering. If he did that to some other girl I’d be very jealous but I don’t think it’s cheating if there’s no commitment made right?