<human>: Okay so a week ago my boyfriend left with his computer on (he NEVER does this). So this horrible curiosity crept up in me to look through it, I have never done this before btw. I have never looked through his phone or anything, I trust him. But for some reason something came over me that compelled me to look. (REGRET!)

I basically found that he specifically looks at chubby/BBW/fat girl porn. I am attractive and have a nice body, nowhere near a bbw. Should I be worried that this is what he is secretly into? There were so many links and I only clicked on a few of them and they were really disgusting, some of them clearly obese. He tells me that he thinks my body is perfect, but at the same time he's told me that if I lost weight he probably wouldn't be that attracted to me anymore. 
I can't stop thinking about it and whenever I'm with him I just imagine him looking at fat girls online, and it really hurts me for some reason. I almost can't look at him the same anymore. 

I also found that he looked up his ex on fb not once but two different times in the same week and right after looking at her fb he went right to her tumblr (like he memorized her url and went to it and looked through many pages). Needless to say that does not make me very happy...

so my question is, should I be concerned? and also should I confront him? I feel horrible for invading his privacy I am usually never one to do anything like that and I regret it, but what's done is done and I can't erase it from my mind. Am I just overanalyzing??

Could you distill the essence of the text into 1-3 sentences?
<bot>: saw that my bf looks at bbw/chubby porn and looks up his ex I don't know how to feel about it