It depends what you mean "no passion", do you mean no sex or not enough intimacy or not the kind of connection you are used to during sex or does he just not act as excited as you want during sex? I think most of the responses are assuming you just mean no sex, maybe that is what you mean but on the off chance that it isn't that, you should remember that sex is a personal thing that most of us have built on the experience of just a few relationships.
I found myself single again at the age of 40 after 12 years with one woman. That relationship was the only real one i'd had, every other attempt at a relationship when I was younger had been either a drunken one night stand or a short series of dates that petered out before we got as far as sex.
Single again, my expectations were fairly normal but I was used to certain things that might be completely incompatible with the expactations of some women. Sex tended to be pre-planned, shows of affection were frequent but limited to kisses, hugs and "I love you" to avoid getting a "you are just after sex" and there were rules in bed (eg, no oral for either of us after penetration) that with hindsight, made our sex life pretty boring.
Since then i've been lucky as the boundries of my expectations have been pushed in various directions by the women i've been in relationships with. I realised that some women like to be reminded they are a sexual being every time you brush past each other while others feel embarased by holding hands in public. That some women need almost to be wooed into bed each night, others can seem almost cold and yet be transformed into a cock hungry slut with a single slow kiss, while others will announce, in a very matter of fact way, which toys and positions we will be using tonight.
Is it possible that this guy's "lack of passion" has been defined by a relationship or two with certain types of women while your expectations of passion are based on the way your ex was.
I think if you really do have everything else going for you (you can laugh, you can talk), you should just talk lightly about this stuff. He might be up for a little bit of expectaion adjustment.
