Guild Wars 2

This is my first thread on the GW2 forum so apologies if I’m breaking any rules or anything like that. I dunno, I’d like you guys’ advice. I have a nasty habit of creating new characters and never getting anywhere with old characters cause I always end up making new ones. I’ve been playing since the game was released and only have a level 59 Engi and a level 56 Guardian. The rest are 30 or below. Here’s the thing : every time I drop the game then pick it back up I don’t want to continue a player, I wanna kinda experience the game from the start again. Especially since I kinda liked the story and I forget what happens during it. Also keep in mind I’m more of a casual WvW kinda guy.

This time, I made another Sylvari Engineer despite the fact I already have a level 59 Engi. There is literally no reason for me to have made a new one :s I don’t wanna delete my old one either since he’s getting all these birthday bonuses. So here’s my options :
1) Finish my Lv 59 Sylvari Engineer, despite the fact I’d be lost in the story.
2) Power through my current Lv 21 Sylvari Engineer
3) Use my Level Up to 80 Tome on my new Sylvari Eng and go back and just do the story, 100% each map, wait for the expansion, etc etc.

I’d appreciate y’alls input and advice!