My boyfriend admitted that he's biual and I'm dealing with it. It's not like it's a big suprise I suspected

it because he was talking to men on gay websites (as "research") he says nothing happened with any of these men because as he got closer to an "encounter" he thought about how it would effect our relationship and that now he relizes that he wants me and only me. He claims he has not had any "encounters" (thats his word for it) since we have been together. Like I said I suspected this and he told me it was me having an issue with trust not him doing anything wrong before admitting it so even though he has apoligized I its made the trust issue worse am I wrong for still being mad or to believe that if he had these feelings at one point during our relationship that he will have them again. We are just now starting to open lines of communication and I dont know receptive he will be to my questions how can I start this conversation without making him defensive I believe that bis can be faithful but does it sound like he can be should i approch him with all my questions or leave it alone