probably a tad over-analyzing ur plight looks like , seems u have a few good things that occurred ::
1- the guy was upfront about bein less than masc , so hes honest
2- he gives u awesome head ...major plus
3- he DID show up when scheduled, usually only a 40% chance with fellas on here
SO ! if hes not really ur type, as in not recipricating cuz hes a femboi, just let him know it was cool hooking up and be done with it, why not be HONEST with HIM ? Not necessarily telling him the reason is cuz hes very femmy, but even if you did i'm sure he'd appreciate ur pref's and realize some guys dont like fem's ... more than likely hed suck ur dick once more for the road, lol !!
As for me, I'm a pretty picky kid, as most gaybois are, but femmy vs. masc doesnt really matter, if the boi looks hot, does all the usual sex acts fine, im good to go, lol One fuck bud of mine @ school is very fem , but man we have mad hot sex., hehe ! good luck in ur dilema , but its not really as difficult to rectify as u may think man !