Sometimes it's easier to write them down in a letter form. You can explain to him that you find it so difficult to say what's on your mind or express what you're feeling .. And this may just help to open up the conversation.
Me and my ex have been trying to figure things out and I'm really bad at sharing my feelings b/c I get really nervous and I don't think he believes that I still love him. I don't know how to talk to him about my feelings?