Found out boyfriend is on match.com

My boyfriend and I have been exclusive for 2 1/2 months. We get along great and he has been very sweet to me. He refers to me as his girlfriend and tell me how happy he is in the relationship. With that being said...one day I needed on his personal computer and he gave me his password, but warned me that before he and I started dating that he was on match.com, but he only went out with one girl, which was a flop and he doesn't get on anymore. What he doesn't know is that after that I investigated a bit I realized he has been on recently. He's added women to his maybes list, deleted profiles he didn't want to see, and has had what looks like a fairly recent online interaction. When I confronted him, he got angry that I snooped through his stuff and called me untrusting and insecure. He says that any interaction he had was months ago. Not only did I see that, but he had his email opened and all messages from July are deleted and the notices from match.com say that he has had interaction with more people than he admitted to me. More recent ones. He said he would get off of the site, but it's been over a week and he's still on. He does not know I can see this stuff. If I tell him that, than the issue becomes I'm a crazy snoop, and not the issue that he is active on a dating site, when he is suppose to be only active with me...I'm not sure how to handle this.
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Also to add...we live an hour apart, and since we've been together, I've been at his place most weekends. He hasn't been going out without me...that I know of...but still, MATCH.COM?
Found out boyfriend is on match.com
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