Just found my long term partner (16 years) has a profile on POF and has been on today. I don't know what to do. I only found it while snooping which I shouldn't have been doing I know. He has been working away one night a week for the last 3 weeks and now I am beginning to question that. My stomach is in knots. I mean I know that things aren't perfect but I didn't think in one million years he would cheat on me.