How Long To Go??????

im currently at abadons mouth(think thats spelt correct) and i was just wondering how many more "main" missions there is to go.ive loved every minute of playing guild wars and to be honest i will be a bit gutted when it finally comes to the end...back to reality

Only one more after Abaddon's Mouth.

I believe you have one more mission, Hell's Precipice, where you kill the Lich and that's it. After that, you have the option to go to The Temple of Ages and try out The Fissure of Woe and The Underworld, but only when your country has the favor of the gods.

Also there is going about and unlocking other skills/items, and even making a new character.

Then if that's not enough to keep you busy, you could.... play PvP, since that's basically 90% the whole point of this game, between guild wars, Tomb of Primeval kings, or just arenas (which are slightly pointless besides just having fun and practicing)