A lot of guys turn and run once they can sense this. It really depends on the situation though. I myself have extreme commitment issues and never get myself involved with people that get attached or are clingy. Don't get me wrong, you can have an emotional connection and still just enjoy each others sexual company, but after awhile it always seems to get serious. Call me an asshole, but that's how I see it.
It's is the main reason why people have "fuck buddies."
Which the OP has 0 of...