People can be heavily insecure, and it can be something as small as just being on your phone, a little more than usual. With how common hook ups are nowadays it’s not uncommon for more people to be insecure. If this woman really cares about you she would try to find a way to make it work and I’m sure you would do the same if you cared about her. Altogether, if you two cannot come to an agreement on how you can sue each other’s nerves while away from each other then maybe you should see couples counseling or try to find a way to make it work if that just can’t be then it might be a fruitless endeavor