Don't feel that way at all. There is no connection with others out in the world of WoW unless you save their ass on a PVP server. Otherwise, its just another shmuck on the same quest chain and you're competing for first hits.
Because of the cooperative nature of GW2's design, everyone helps each other and the mood is more friendly. I rez others, get thanked. Others rez me and I thank them. I see someone running from too many mobs and I can jump in, not punish them or myself, and it works out fine.
As an example, my girlfriend and I were trying to get to this Vista in Lornar's Pass. It was up on this rock jutting out of the side of a mountain. We weren't the only one trying to find a path to it near the bottom, but nobody was figuring out the route. GF gave up for the time being and went afk. I looked on the map and saw what looked like a path up the hill further north.
So I go that way and find the path. The pathway is lined with Ettins and I don't feel like fighting Ettins. So I equip my stealth and escape setup and wander through the Ettins. Near a path that seems to overhang the Vista's ledge, I run into a Charr Engineer thats downed with two Ettins beating his face in. I pop in, drop some illusions and a chaos storm, and rez him up, then finish off the Ettins. We try to get to the vista, but still can't figure it out. We both go up the other path and find more Ettins, We dispatch those Ettins. Then at the end of the path we see a few huts, three veteran Ettins, and one Champion Ettin Boss. We clear out the Vet ettins, with my stealth and his turrets. That leaves the Champion Ettin boss. We still haven't talked, but we understand what each other is doing. If this was any other MMO, we'd have to party or we'd be screwing one of us over. It's not needed here, the communication is through play.
I engage the Champion first, dropping a Chaos Storm and Warlock on him. I switch to my sword and engage at melee. The Engineer sets up his turrets and plays ranged. We juggle his net turret immobilze with my iLeap->Swap immobilize, as well as my clones cripple to kite him. A ranger shows up near the start, rushes in and gets downed fast. We kite the boss away from him, then rez him. Now there's three of us, two heavily ranged, and myself ranged/melee. I play mostly melee, juggling my cripples, immobilize, and blind from Prestige to mitigate damage from the boss. I throw in a Diversion shatter when I can to interrupt his big knockdowns. The ranger drops healing springs, the Engineer Healing Turret, and I blast finish within them, and my Phantasms are traited to apply regeneration.
We basically kite fight him, working very well together. The Vet Ettins even respawn on top of us, and we split very naturally and take them down while maintaining the boss. It takes awhile, but we down the boss and it was very well coordinated without conversation. We just understood the language of the combat field.
We say good job, loot the treasure chest, and go back to trying to get to that vista. Eventually the Engineer finds the right angle to get over the rock, I follow, and we make it down to the vista. My GF's back, so I drop a portal on the cliff edge, hop down and drop the other portal. My GF and one other portal back up and get the vista.
In another MMO, that Ranger would have been screwed out of the fight. My portal couldn't help another player not of my group. The group might have been screwed if nobody could tank the boss. The situation might not have even began because the Engineer would just be a strange corpse in the world that means nothing to me.