Your obviously picking the wrong guys if they keep cyber cheating on facebook or webcams.. do you dive in head first and ignore red flags? How long were you with these guys when you got engaged? 3 engagements is a lot!
What about sex in the relationship? Is it a priority for you? Do you make sure hes satisfied? Im not saying its an excuse to cheat but it is hard to stay committed if your not getting enough at home..
Were these long distance relationships? Did these guys have a history of cheating or a history of no strings attached sex?
Your picker is off and you are choosing the wrong type.
Your standards may be too high though. Do you consider looking at a fully dressed picture of someone he knows on FB or snap chat cheating? If yes, that is you being too insecure. Im not on snap chat, neither is my bf-I don't even know how it works.. maybe find a guy that couldn't be bothered with modern technology. My bf didn't even have a FB account until a few years ago when I made one for him so he could send me gifts on farmville lol
If your this insecure about it-then find a guy whos computer illiterate
"Don't ask a question if you can't handle the answer".