First, cut her off completely. You are human, it’s going to hurt, and there is no off-switch for your feelings. The fact that you are listening to her talk about other guys mean you two are still hanging around. That “we are still friends” BS is just a form of clinging on (people tend to want a safety net, holding onto the old until they’re sure the new will take off). Get as far away from her as possible. Take away each other’s safety nets.
Second, channel your engergy into healthy activities where you will meet new people. Don’t try to run out and hook up with someone new, just try to get out there and make friends!
Here’s a club in SD you can join (free) for all sorts of healthy activities for people aged 21-40:
