Partner won't leave ex alone to save us

Ok, so recently myself and my partner have not been getting on like we used to, it's down to lack of work and social life and its also mostly from her side, I knew she talks to her ex before we became serious, but it has become more regular. She told me the other day that she wasn't sure if she was still in love with me but wants to keep trying as she hopes there's still something there for her, this has broken me in two and I have said to her that talking with her ex when she is feeling like this is not going to help us, she said she understood but the conversations with her ex have become more frequent I can tell, she used to tell me about every phone call and message between them and I joked that now I've told her to reduce the contact with him that nothing will change and she will just stop telling me about it, she agreed that would be the case, I know they speak a lot and I'm desperate to make us work, but I feel my efforts are useless if she still has so much contact with him, I've never said to stop speaking with him just at this hard time in our relationship I'd appreciate that she put more focus on me and not him, I want to get it through to her but I don't want to come across as nagging or that Im jealous, I don't know how to bring the subject up any more?

She's yours now. & you need to show her your jealous side. Show her that you are trying to make this work! You need to tell her she needs to stop communication with her ex. If not. You will loose her