I miss her

Okay i need help humans. So my ex and i have been apart for a couple of months now but we still talk quite regularly. Recently she was on a long car ride (10hrs straight) and she needed help staying up so i stayed on the phone with her until she got home (6am, she left at like 6pm). I thought i was over her but after that night ive realized that im not. I totally screwed up that relationship and it kills me. I want to make things right, i want to be with her again. I literallt cry myself to sleep almost everynight because i feel so bad about ruining our relationship. I love her so much and she means everythig to me. She keeps saying shes moved on but idk what to do. Since that night (friday-saturday morning) we havent talked. Idk what to do someone please give me advice. Btw she lives in iowa and i live in ny so i cant exactly take her out for dinner or anything like that.