Longest Range For Walkie Talkie Is There Anything That I Can Buy To Keep In Touch With My Girlfriend?

Is there anything that i can buy to keep in touch with my girlfriend? - longest range for walkie talkie

She goes to school and soon discovered that the phone only allows SMS messages and of course, that I call it very much that while shes in the classroom, and vice versa. I wonder whether it might be a kind of things that two people remain in touch, perhaps a walkie-talkie allows long-distance or what? Please give me ideas, thank you!