Lack of desire in relationship?

First time here, so please be kind. so my issue is quite specific. I’ve been messed around on relationships a lot in the past, but have finally met this great guy. He’s smart, funny, respectful and just great in almost every way. He says I’m the only one he wants and that I’m ‘perfect’. And yet, I can’t seem to shake this feeling that I’m not what he desires and really wants.. This could be influenced a little by his past, he told me when he was drunk that he’s slept with 200+ women (many whilst travelling in Thailand) some of whom he said were crazy hot… he seems to revert back to talking about past encounters when he drinks, never asked for, and sometimes not in a big way, but might say something stupid he thinks I will find funny (I guess) about stupid ways he used to pull women.. now this alone I think probably wouldn’t bother me much. We have been together 6 months, and sex with me has just never been high on his agenda - doesn’t often initiate it, often doesn’t seem that interested. Yet is overall a very affectionate and attentive person. (If it helps for context I am 33, he is 39. I wouldn’t say I’m insecure per se, as am in good shape and do get interest generally, I just get this feeling maybe I’m not what he wants… thank you for reading