pisces ex boyfriend acting strange?

I was with my ex for 7 years and I have not heard my ex in 2 years he moved on and got into another relationship we ended things because i moved away which really wasn’t a nasty break up btw so yesterday i receive a text that says the word “too” so i texted back 3 hours later asking who was pretending like i didnt know he texted back saying he was somebody else and also asked where do i live? whats going on why is he texting me 2 years later, pretending to be someone else and asking for my address? he’s a pisces if it helps and i know its him because his number popped up ?