How can I talk to my ex?

I broke up with him, but he's been trying to make things right between us and I'd be open to giving him a second chance. At the moment, he's initiating most of the contact. The problem is that I feel like I can't contact him first unless I have something important to tell him, which more than often, I don't haha

So help me out here. What's some ideas for things I could say just so he doesn't feel like he's the only one trying?
How can I talk to my ex?
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