Classic Playing a warrior and expected to tank?

So I'm currently a mid 20's arms warrior, and I'm really liking it. I am not confident in my ability to tank, and if I do take this one all the way to 120, I know I'll be expected to switch specs tank at some point. I know it'd be optimal if I learned to tank, but should I let that make me rethink being a warrior, or should I just play it because I like arms, and tell people that I'm not tanking? via /r/wow https://ift.tt/36PnTlZ