Insecure

Okay so I opened up my browser today to see this on my screen. I was curious to why it was on there and wondered if there was more. Guess what? There is! There is over 200 pages of single latinas that has been looking up and a link to the registar page meaning that he signed up for a latin dating website. I'm not really an expert on dating and I know I'm far from perfect but I would never do this to him. We finally got engaged and hes already looking for someone new. That hurts so bad! I personally don't know what to do because everytime I try to confront him about things like this he turns it around on me making me seem like the bad person because I'm "snooping around". I already have trust issues with men because of my past relationships and now this? What would you do? Is it just harmless behavior or should I beware of bad things to come? I have no idea what to do. I realise that yes I have cheated on him before but me and him talked through it and I am over it and I never did it while we were engaged. I did it when we kept splitting up which happened alot early in our relationship but now I got all of that out of the way. I am actually wanting to settle down with him but trusting him is becoming harder and harder when he does things like this.