Is this scenario considered cheating? Please read.?

[Kelsey]

Hi I have been having this on going argument with my boyfriend. Now this is a while ago that this happened. About the 4th month we had been together he took a girl on a date and bought her dinner behind my back. I consider this cheating since we were dating. You know boyfriend girlfriend status. He doesn't consider that cheating or that it was wrong. Around this time I also had found messages on his phone and Facebook asking women out talking to exes etc. Now of course we had a huge falling out and broke up. Long story short we ended up back together and 2 years later he hasn't had any problems like that since. But on occasion I bring it up because I do think it was cheating and still to this day he doesn't think it was wrong or cheating. Please give me honest answers on this subject. Thnx