Give her some time. If you had a very close relationship before you will most likely have it again. For now she is testing her wings and will not need you as much. When she does she will call. It may not be the same as it was before because she will be more independent but it will get better.
My difficult child and I are still in a stage where I limit our conversations because she cant control her anger and her GFGness for too long. I still have to worry about everything I say. But when she first moved out we talked only when required for money. Honestly it wasnt until a year later that we spoke about anything personal. It took that full year for her to need me enough to put down her pride and make the call. I had to wait it out. Not because of my pride but because she wouldn't have received any personal communications well until she was ready.
Dont worry though. difficult child and I never had that close loving relationship it sounds like you and your daughter had. I wish we had. But it just wasn't us. Maybe I should say it just isnt me since I dont have that relationship with easy child either. I think you and your difficult child will get back to your friendship/relationship much faster than I did with my difficult child. You have a strong relationship to build on. difficult child and I did not.
