Until when did you use to go to Methana? I can't remember, were you also staying at Mrs Maria's, who had a daughter named Youli? We were staying at my aunt's Eleni, my father's cousin. We used to hang out with Youli but it never went further. I haven't been to Methana since 1994, when my father's house was built in Poros. Since then...
AAAAAaaah, so there was indeed something in the air...
The first sentence implies message writer (A) and receiver (B ) were going regularly in a place named Methana, and that they both stopped at some moment but not the same, (A) first, then (B ); and here, (A) is asking (B ) up to when did (B ) keep going there.
(A) tries then to recall where (B ) was staying at.
A better english would maybe modify "I don't remember" by "I can't remember" eventually.