I have never physically had sex with another person while in a relationship. I have been emotionally connected to other people while in a relationship. I don't think your cheating unless something physical happened, but if your emotionally pining for someone else you should probably take a look at your current relationship. The joys of learning the world of dating do's and don'ts.
I have been cheated on before at least twice. The first one was pretty hard for me and it was probably the turning point where I stopped dating for a long time and only wanted sex. During that period I hooked up with a guy for a friends with benefits thing. He was always pushing for us to be boyfriend-girlfriend thing and even asked me a couple times to marry him. I knew he was cheating on me with a couple different people. For someone who "was an expert at the internet" he sucked at hiding his adventures. It didn't bother me and he disappeared for six months. I later learned he did have a girlfriend. I broke off the FWB deal after that. Funny thing is six months later he contacted me again. Begged me for forgiveness, said he was going to leave his girlfriend for me, and all this other crap.
I have been cheated on before at least twice. The first one was pretty hard for me and it was probably the turning point where I stopped dating for a long time and only wanted sex. During that period I hooked up with a guy for a friends with benefits thing. He was always pushing for us to be boyfriend-girlfriend thing and even asked me a couple times to marry him. I knew he was cheating on me with a couple different people. For someone who "was an expert at the internet" he sucked at hiding his adventures. It didn't bother me and he disappeared for six months. I later learned he did have a girlfriend. I broke off the FWB deal after that. Funny thing is six months later he contacted me again. Begged me for forgiveness, said he was going to leave his girlfriend for me, and all this other crap.