CHEATING

how does cheating mostly work does it like start with flirting then nudes possibly then just keeps on going deeper and worse? I know my bf is cheating and he tells me he didn't sleep with her I read my bf's and this BITCH's text messages i didnt read anything with sleeping just nudes but do u guys think they did it? I care but I don't im jsut so done with men😭😭😭 what us the processs ugh