My gf texts with her ex, pretty commonly. Not when I'm there but sometimes on skype. She wants me to be friends with him, and tells me that shes 'just friends', even though me and her both know he wants her back she tells me it doesn't matter because she doesn't want to be more than friends with him. When he started talking to her about them two getting back together, I got pissed and told her I was going to fight him. She got upset with me when I told her that. She shows me her text when I want to see them. A month ago she texted her ex she loved him to after he told her that he loved her in a text. He was at her house once, although he doesn't go there anymore (She lives with her mother, and her mom doesn't want her around other guys while shes dating me).

Do I tell her to stop talking to him or what do?

Shit bothers me.