@eleanorp22 you are right to be concerned. If they don’t see interest from you, they will reject you.
I think there is information in the portal about Lehigh. Be sure to go through it to learn about the school and be able to explain what it is about Lehigh that you find appealing.
@kikkydee is right also.
Contacting admissions and asking for an interview are both good ideas. They do understand that students who live far away can’t visit. There are other way to show interest. They just take a bit of initiative from you.
Let us know how your contact goes. We would love to hear about it.