Help friend relationship is it gonna last?

me and my friend mandy have been friends since we were 4 and we r best friends but we fight alot more than normal friends do. before we were like siamese twins thats how close we WERE now we are split siamese twins she got sent to europe and im still here in usa. she hurts my feelings all the time and she says i hurt hers i asked i said why are we even friends she said bcuz she loves me lika sister. but i love her too and we hang out and are normal sometimes so we gonna b friends forever??