I have recently broken up with somebody of a similar sort, as you have explained of course. He would brag about how many girls he would get, how amazing he was in bed etc. I soon came to realise it was just all egotistical crap.. He has a very competitive personality, a lot of it is constructed with his ego..everything literally comes back to his ego and he cannot take if something or someone is better than him in any way.

Now sexually yes he was amazing, but in terms of the girls it was all ******** as he would never mention the rejection he received. Now one thing bothers me about him, I cannot quite work out if he actually acknowledges he is a ********ter and does not get all the lasses he thinks he can get..as I have studied at uni with him and have come across the girls myself and all their stories were very similar.. or that he is genuinely convinced by his egotistical ********..like that he believes it as his perspective is **** or that he jus rejects the actual rejection he gets and believes what he wants to! Even towards the end like if I would relatively talk about somebody at uni that I had an encounter with, like kiss or whatever, he would make up **** that he had done in some sort of underlying revenge. It was really weird. And u would have no idea he was lying, as I believed everything he said until recently when I went over it he denied it all and actually found out off the girls nothing happened either. WAS WEIRD!

But it all goes right back down to insecurity. You must be better than him in ways that you appear to come across as a threat to him, perhaps you are more experienced in areas who knows? But it sounds to me like he cannot take your above him in a way, when all he needs to do is openly express the reality of who he is. Guys don't understand that we appreciate that!