First of all, relax. It’s not weird or shady that you’re interested in your ex-girlfriend’s friend. Actually, it’s pretty normal. Attractive women often have attractive friends, and many of them will have similar interests. So whatever attracted you to your ex could also apply to her friends. Plus, while dating your ex, you probably got to know some of her friends on a much more genuine level than if you’d met in a bar. That’s not to say it’s going to be easy. No sir. But if you keep a few things in mind, you might just be able to pull it off.