I have a feeling my girlfriend has cheated on me. It started a while back when she was constantly texting and Facebook messaging a security guard at her work and said it was harmless although he wanted her to break up with me. She wanted me to put upload a photo i took of her to Facebook which I did but the same guy started a conversation and it showed the past conversation. Needless to say it mentioned her asking him to 'come over for a few hours' and meeting up with him. I also noticed a conversation with a guy that she must of used to see, and she still finds him attractive and was basically flirting with him. I know I shouldn't of snooped but it was accidental, and then curiosity got the better of me.
I really don't know what to do now.