Obviously you would never want someone to be "obsessed" with you. That's just a scary situation. But if you're asking how to keep your guy's attention and have him always want to be around you...that's an easier, and simple answer. DON'T NAG! That's a huge issue with guys. Just be cool with him doing his thing and make sure you always do your thing. BE AN INDIVIDUAL! Guys love girls that have their own life. AND BE CONFIDENT! Nothing is sexier than confidence on a woman. Why would a guy have to go anywhere else if you've made it pretty clear that you're pretty awesome. Not in a snotty way, but in an "I'm not worried about you leaving me" kind of way. Know what I mean?