sexually aggravated

Bridget
My ex always joked that I'm a nymphomaniac and now that we've broken up I've been struggling with the whole "not having sex" thing. So I started hanging out with this guy and we're had sex a few times and...for a lack of better words...it's lacking. I usually fake an orgasm just so we can stop. 
For the most part he want me to blow him for about a half an hour then he will hump away for 10 minutes then back to a bj. And he says he doesn't like to eat out so he just doesn't.
So, pretty much I'm wondering if it would be wrong of me to sleep with my ex because I know that he will make sure I've very taken care of. But at the same time I kinda like this other guy. Should I wait it out and see if sexually things get better?