advice?

hi so me and my girlfriend who i love with my entire heart are 1,400 miles apart. i’m in new jersey and she’s in missouri. i’m 15 so i can’t drive out to see her (which is a 17 hour drive btw) and i don’t have the money for plane tickets to see her. we have plans to move in together once she turns 18 but that’s still a ways away. i’ve tried to see her multiple times but something always gets in the way. i can’t handle hearing her sob over the phone because i can’t visit her yet. we’ve been together 6 months (this month will be 7) and every anniversary she always asks if i’m coming to visit soon. i need help on how to make the distance more bearable. we just can’t take the pain anymore.