You should talk your friend into giving Guild Wars 2 a shot. The base game is now free to play, and it's quite fun and gorgeous (at least up until endgame, which used to suck but I've heard has gotten better).
If you play GW2 though, be sure to choose classes that start in the same city or you'll never see each other.
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Thayos Redblade
Jormungandr
Hyperion