Caught out & Not falling it!!
I agree, to a degree! When are you gonna tell her it's over fantasma, when you arrive, or when you leave? In a way you are leading her on, because although you haven't made any promises, you also haven't ended things, in fact you are perpetuating things by seeing her again.
If you plan to end things you should man up and let her know this before you go, and let her know that your visit will be one last hurrah. This will give her the option of either meeting up with you on those terms, or moving on with her life. Telling her after your arrival would be selfish IMHO. No offence.