I've been with my dp 13 years live together. Both have kids none together. Weve had our ups and downs over the years. Never he was cheating recently. I found a message on his phone saying night babe xxx from a young colleague from work on xmas morning. I asked him about it xmas night, said was a jokey thing asked for a look in his phone her refused. Hes secretive with phone. Always online with WhatsApp. Working extra shifts. Lost weight. I'm not being paranoid am I?