Cheating confusion?

Celine
I've been with my guy for 5 years now and he's been talking to different females on the phone and IMVU and that type of thing. But why do guys feel like they have to have sex with someone else for it to be considered cheating? I feel like if you're sneaking around with your phone and you're calling her baby and all that shit, I don't give a damn if you not having sex with her!!! Is it just me?