I dated a girl from the other side of the US. (Wisconsin vs Arizona). We met for a couple weeks in high school when she was visiting a mutual friend, and hit it off.

We emailed constantly with occasional visits and when she was ready to move to my state (she was already planning to for other reasons) we finally got to date more regularly.

While that relationship eventually ended, I met my wife when we were a two hour drive apart.

Point being, a distance relationship has merit. Even if it's by phone or emails. Later on make the trip. Maybe she will be able to come see you until then.

Be honest with her. At least ask if she'd be willing to come visit and that you wanna keep seeing her, but you have trouble traveling right now.