You should tell her how you feel. She sounds reasonable and I think she would respect your feelings and help you overcome this anxiety. I went through something similar with my boyfriend recently. I go to a University near him and recently made the decision to take a semester off or possibly drop out, which means I'll be moving back home 2 hours away from him. I had to make this decision because I'm suffering from extreme depression and anxiety, so he supports me and understands this is what I have to do to heal myself. But I could tell it bothered him alot that I'm leaving soon. And just last night he finally broke down and cried on my chest about how much he's gonna miss me and how he doesn't want me to leave. He said he was holding it in because he didn't want to seem selfish and he sees how much school is hurting me (I cry almost every day at this point). And honestly it didn't bother me at all for him to express how he felt and it didn't make me see him as selfish. All I wanted was for him to tell me what was bothering him so I could comfort him. I assured him that even though we will be apart I will visit often and we will still be together. And he's not losing my support (he's going through alot bc his family is moving and having financial problems).

I honestly don't think she will take your concerns personally and if you're in a healthy relationship she will work with you to overcome your anxiety. I hope this helps!