No, Paul is addressing the church, then and now. His use of the word "we" in the passage you quote has that sense.
It's characteristic of Paul, see Ephesians 2 for another example.
To come back to your point, if you read the rest of Paul's letter to the Thessalonians, you will find Paul's position (which is in fact Jesus' position) on the matter:
"Now, brothers and sisters, about times and dates we do not need to write to you, for you know very well that the day of the Lord will come like a thief in the night"
You can't slip a piece of paper between Paul and Jesus. Jesus himself authenticates Paul as one of his apostles.