Guild Wars 2

me and my friend want to go play wvw he recently got the game but my server is full so he could not join i told him to join any because of the mega server but now we want to play wvw and my world is always full we have tried a few times at off peek hours but we have no luck could anyone help

Your friend is going to have to wait for a spot to open. No one can make a spot appear or even reserve one for someone else.

Conversely, you yourself could transfer to his server if his server is open more often than yours.

I would but we have 6 other friends on my server that occasionally play so if we keep waiting soon there will be a space

It will likely be quite some time before any Servers change from Full to Very High, now that the population is calculated on WvW participation.

You and your friend(s) will need to make a different plan, as waiting would probably mean months and months.

Good luck.