My friend is having b/f problems. How can I make her feel better? What should I do?

[Tommy]

Ok my friend was with this guy she really likes but she broke up with him a while back because she got in a fight with him. She saw on his phone that her b/f was talking to an ex of his but when she asked him if he talked to anyone lately he lied to her. So they broke up but now 2 months later about she still loves him a lot and can't get over him. Just yesterday she texted him to see how he was but he hasn't replied yet.. freaking jerk.

If your friend was having this kind of problem what would you do to make her feel better and forget about him? She is not confident in herself and I think he makes her feel good about herself but trust me she don't look bad at all. I really wish I could just find a way to make him come back to her again so she could be happy again. Any suggestions will be greatly appreciated. I know this is a long question but I really wanna help her and wanna give you all the details. What should I do?