I'm surprised that so many people here are willing to tell you to cut and run and never have anything to do with anyone who has looked at this stuff before. Although what your boyfriend is looking at is not normal and is not healthy, I don't believe it means that he can't address this issue in a healthy manner by changing his behavior.

I'll preface this by stressing that this is my opinion. Perhaps what everyone else is saying is right and I want you to be open to what they have to say. I know the thought of leaving your boyfriend may be incredibly difficult and you may be looking for any excuse not to. Don't let anything I say justify allowing your boyfriend to be involved in something so unhealthy.

I believe that what you absolutely need to discuss with your boyfriend what you encountered on his computer. Yes, you shouldn't have been snooping, but that doesn't change what you found. If your boyfriend accuses you of breaking his trust, let him know that the child pornography is the real issue here and that you will have to break things off if he can't make you believe that he will stop looking at the porn, that he understands it's illegal, and that he understands that child porn isn't any better than performing the actual act.

For all we know, this could have been an isolated event -- perhaps he was unsure about his feelings and began to explore child porn to confirm what he feels. I know that I've looked at mentally unhealthy things (suicide videos, for example), but I'm happy that I have a boyfriend who would not leave me for those thoughts but who stills expects me to cope with my issues the way a normal, healthy person would do and not in the unhealthy ways I have done in the past.

It's important that this is addressed. I believe that your boyfriend can change by changing his behavior and understanding the consequences. If he can't do both of those, then things need to be broken off. Being unhealthy is one thing, but refusing to take care of your health is another.

If you are uncomfortable with the relationship, for whatever reason, you need to know that sometimes it is better for your health to call it quits. Your health matters too.