Suspicious??

So my bf and I have been having trust issues due to me finding out about lies and disloyalty. Now I’m just super paranoid after finding out certain stuff that I felt was wrong. The other day he was on his computer and a bunch of messages were popping up so he logged out of his iCloud on his computer and now I notice that he clears his browser history after using safari… are these weird things or am I just being paranoid??? How would I even bring this up without accusing him of anything. He has cheated on me emotionally in the past with people he had told me not to worry about and something just feels wrong again.