My ex is dating a new guy
Her friends will be there for her, but friendship can only cover some of the emotional needs of a girl who's feeling hurt and rejected right now. Being there for your exgirlfriend after her new romance has failed is a huge step toward winning her back.
You're in a strong position, and she's weak, tired, and emotionally spent.
This is a great thing, because instead of dealing with those feelings she chose to bury them.
During this time, all you can do is lay low and work on yourself - stay active, and keep a positive mindset.
As in the case of most break ups, the more she sees or hears from you the less your exgirlfriend will be thinking about you.
This is the time where her new boyfriend can do nothing wrong, and everything is all puppy dogs and ice cream for her.
You could show your ex a mugshot of her new boyfriend's murder charge... She's going to stay with this guy until the honeymoon ends, which could be anywhere from a few days to a few weeks, even a month.