I don’t know what to think..

Last night I was in the kitchen and my finance was on the couch, I went to ask him how many eggs he wanted and he was on Snapchat and I seen a name something close to Freaking Sophia. So I asked him who it was and he said it was nothing. So I asked again who is that once again he said it’s no one. Later that night I took his phone and it was deleted... I am really curious what it was. multiple times I have caugh him looking at naked girls on Instagram.Now I know kinda know why he has never left his phone alone, he always takes it with him. And he wonders why I haven’t been in the mood to have sex for a while I have been having a feeling something has been going on..