<human>: I [21 f] have been seeing/dating a [22 m] for about a month, we have known each other a bit longer but got together. He told me a little bit of his heart still belongs to his ex. 

Things between us are just so perfect. We get along so well. I want something more. and feel like I should move on. But I just can't shake the feeling that things would go so well with him. 

I am not really threatened by his ex. They are still friends and are in a band together. But I can talk to her and not feel like shes threatened by me. I dont have any jealousy toward her. 

He also told me he was confused about his feelings because what he feels now is similar to the beginning of his last relationship of four years, and that he doesnt know if he can trust his feelings. though we continue to see each other. 

Do I move on? or persue this further?

Can you give me a shortened version of the text?
<bot>: I want more with my FWB but he isnt quite over his ex. How do I help him get over her or should I move on?