Play-style Dilemma

Hello friends, I'm Grizzly in game but my real name is Damon. So, I really love this server, being 2x and super well coded, and I believe I want to continue having great Maplestory experiences. However, I haven't been playing nor have I even hit 100 despite joining on April 2nd due to a lack of motivation. I think my problem is that I:
1.) Played a DK on two other lower rate v.62 maplestory servers to 4th job and 30k HP as well as in GMS(not 30k hp here, phew my wallet), which those servers suck compared to this server might I add.
2.) I keep saving NX for AP resets and such and waiting to level rather than save AP, plus I'm worried about other classes not having enough HP to be useful at fun boss runs, making me miss out on stuff.
3.) Have a somewhat difficult time making friends since I am quite timid in nature, despite being troll in game. Those who know me well know I can be troll. ^^

I am rather bored of the dk class but it seems like every time I make another class to play I end up missing my dk. I've only tried dk, shad, and bishop before so.. I don't have much experience when it comes to classes other than those. I'm a rather carefree guy but I'm always afraid of not being able to survive boss runs or something like being too weak damage wise and it takes the fun out of it for me. Anyway, I don't know what I should do. Should I just stop playing? It seems like every time I quit I somehow get sucked back into it. Should I just suck it up and dump NX into getting my DK to 30k hp and take forever to actually play the game? Should I start a new class and try to stick with it? What about washing that class? Hopefully you, the players on the server, can give me some helpful advice. I really do love the server and appreciate the slow rates. I'm just struggling to choose between damage/utility and a classic, good v.62 fun time. Sorry if I come off as whiny or wimpy because I can't hold out to wash my DK. It's just that I've done it like three times already. Kappa
Sincerely,
Damon (Grizzly)