Advice needed- boyfriend and my friend

My boyfriend when drunk, two months ago admitted if we werent together he'd want to screw my friend. I forgave him later on after that fight. I got suspiscious though I snooped through his phone. And I find this message between him (the me part) and my friend (the blurred name). She's talking about her ex boyfriend. I've been her friend for five months and I introduced them two months ago. I dont understand why he thought it okay to ask my best friend if her man made her orgasm or not it really hurt my feelings and he wrote that on our one year anniverary. He didn't find it a big deal and he apologized but he was angry I had her delete his contact. But that was my only compromise is for them to just not talk anymore or be friends.

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Apologies for spam just was desperate