Search Results: asking for his number

So this random girl was texting my boyfriend and flirting with him asking for help. I have access to his messages and I told her no and deleted them. I told him and he got mad at me and made me lose access. I deleted the messages and he said he won’t talk to me until I give him her number. I should have access because in the past he slept with two women. So this is why I have trust issues. I think it’s screwed up what he’s doing not letting me have access or talk to me just because I won’t him her number.