My Bisexual Boyfriend: Advice Needed!!!

This request for advice was posted as a comment within the last 24 hours.  Please help this woman by posting your reply in the comment box below.

Someone please help me! I want to hear from more people like this. 

My boyfriend of 3 years and best friend for 7 years told me a week ago that he was bisexual. I found online accounts and some porn. On the accounts he was having online sex with men. I'm terrified that he might be gay and hiding it. We've always had a deep love connection and I truly believe that he does love me. I wanted to leave him and he begged me to stay saying that watching gay porn every so often was enough. 

Before I found out, our sex life was okay but had died down a little bit. Now that he's told me I feel more connected to him on a personal level and the sex has been great. Our love though has always been strong. He does everything for me. He works and pays for me while I go to school. He puts up with my bitchy attitude. He says that he would rather die then ever be without me. The one thing that scares me more than anything is the fact that we are each others first. What if he wants to experience what it's like to be with a man? 

He tells me that he doesn't want to and he really is attracted to women more then men he just likes to look at porn but would never actually want sex. I don't know if this is the truth or him denying his own feelings. I'm terrified. I never thought that my life would be this complicated and painful. I really want things to work out between us. However, I can't trust him ever again and I don't want to waste my time with someone who ultimately might end up leaving me. 

I get on here and read stories about guys who truly loved their wives and just couldn't make it work and it scares me. He says he feels like a weight has been lifted off his chest now that he's told me. That's really great for him but now I'm worried constantly. I tried to talk him into doing different stuff in the bedroom...involving more stuff with his butt and he gets angry and doesn't want to do it! so does this mean that he really does just enjoy looking at it and talking about it or is he that far into denial. I'm so scared about our future.  - Mackenzie