he cheated on her with me.. only on snapchat.

Yes it happened. We did things 3 times on Snapchat. Which at 17 I believe that they do say it's cheating right? I'm not even sure. I read somewhere that it doesn't really count now as they aren't married and we are all so young. So he's testing the waters..... he has asked me over to his place.. idk if I want to go. As I feel like something could happen in a real cheating way!! But do 17 year olds even cheat sexually in person? Or is it more for the ' adults' like In movies etc. what if I just went over and nothing happened.  And it's only for snapchat purposes ya know? Not real life. But then again we have seen eachothers parts. We are work colleagues too.... maybe I shouldn't do shit with him anymore. It's too bad and wrong but maybe I should just forgot about it and pretend it didn't happen.