Lying about sex

so I’ve been seeing this guy for several months now and he is, or pretends to be, let’s just say very confident, he loves to throw around how he always hits that g-spot and how girthy he is and things like that. He also loves to mention all the different types of sex he has had with his exes and what they have said about him in bed and what turns him on. he will also tell me how many times he thinks I have orgasmed in bed with him and how it turned him on. it used to be cute and a little bit of a turn on for me until I realized it is more talk than anything. most of my orgasms with him have been faked as he is pretty small and struggles with rhythm to get the job done and now I just find myself annoyed. last night when we slept together he was talking about how many times I supposedly finished and i felt bad thinking we are now in this situation where there is a level of honesty on my part but how do you tell someone something like that? regardless of this situation I really like being with him, he has many great qualities. he is a really great guy with maybe some confidence issues he isn’t aware of and I don’t want to make that worse for him. what do I do?