In the end Susan decided to fess up. Why? “Because I got the vibe from him,” she says. “He wanted to hang out more and started acting weird when I talked about other guys. So, I finally confessed and now we’ve been ‘together’ for six months.”

While Susan’s pal-turned-partner situation worked out well, remember her advice: You gotta feel the vibe. If you’re not sure he feels the same, it’s probably because he doesn’t.

Are you in love? Or do you hate that he’s in love?
Ask yourself these questions when you feel the urge to express your emotions to a former flame who’s now taken. But once sure that you’re blushing with love and not just green with envy, then is it okay to share your true feelings?

“No,” says Tom Martin, 32. “I believe it is in horribly bad taste to tell someone you love him if he's with someone else. If you really love someone, and you want to see him happy, then you'll keep your mouth shut.”

But if you’re sure he’s with the wrong girl, don’t you owe it to him to let him know how you feel?