help?

Camryn • 22, Senior at UW Platteville . I'm an amateur makeup artist and love karaoke night at the bar and spending time with friends
OK ladies, I could use some help for this one. The thing is is that I've had a crush on this one guy for over a year and he and his girlfriend broke up about a month ago. Would it be wrong of me to try and go out with him? His girlfriend and I are kind of friends but we've never really been close. I don't want to hurt her but then again she became really rude after the break up. She started posting all kinds of tweets full of attitude about how the relationship was a waste of her time but really the guy did nothing wrong, she's just salty that he broke up with her because he wasn't happy in the relationship. And lately I've been noticing him talking to me a lot more and seeming to be hinting that he likes me, should I go for it?