<human>: Reddit, am I a total fool? 

My BF [30M] and I [24F] have been together for just over two years. I went away for a wedding one weekend this summer, and when I came back, I found some pretty startling things. We live together and shared a computer, so nothing was really private. We kept all of our stuff logged in, and I never thought about it twice. 

I was looking for a photo on his google+ account (since they are automatically uploaded from his phone) and found some VERY graphic photos with him naked, masturbating, etc. He did not send them to me, so I was curious why he took them. Upon some further (and not complicated) research, I found out that he created a fake email address and was also looking at personal ads on Craigslist and Yahoo (among other things). 

I obviously confronted him about this and he said that he was drunk and just wanted to look at pictures. He went in and wiped everything from his fake email account (but claims there was nothing there...) I was hesitant to believe him, but he was honestly really upset and I just didn't think he would be the type to hook up with some rando online (or cheat on me in general).

This was a month or two ago, and while he is still on probation in my mind, I have generally forgiven him.

HOWEVER, tonight when I was looking for furniture, I discovered a post that he posted on craigslist when I was traveling back in 2010. It says "Looking to have some fun with a hot lady tonight. I'm 28 and bored tonight. Send me a pic and lets see where things go". 

To me, this shows a pattern of behavior, and I don't know that I can believe 1) that he was just looking at craigslist for pictures and 2) he actually wants to be with me and is not actively seeking opportunities to hook up with other people.

Again, I asked him about this post and his only response was "I have changed for you. I am sorry". What do I do reddit? Leave? Forgive? 

Fool me once...

Could you distill the essence of the text into 1-3 sentences?
<bot>: My boyfriend previously posted an ad for a "hot lady" on craigslist and looks at personal ads while I am traveling. What to do?!