What would you do?

So me and my boyfriend had issues because I had a guy bestie and he think me and him are cheating on the low but we have never done anything a high five is the most we touched each other so my boy friend has had been cheated on by one of his exes and told me to choose between them what would you guys do (he took my virginity and we’ve been together for about 6 months but we’re talking for about a year)

How he explained it to me is that he wants to be both my best friend and my boyfriend and he can’t do that if someone holds that place