Multitabling....necessary?

I've been trying to play short-handed exclusively the past month, and it's going pretty well thanks to a pretty good run of cards. However, any time I try to add more than one table, things go down hill fast. I end up losing at both tables because the action's pretty fast, and the decisions are more marginal than in full ring games.

Now I can two and three table full ring pretty well. In fact, it gets boring not doing so some days.

My question is, how necessary is multitabling short handed? If I'm not comfortable with it, and lose money doing it, is it something I should push through? Should I continue to play one table for a while and hope I get more comfortable later?

Am I a clumsy, short-attention-span-having fish who is destined to one table for the rest of my days?

In a single question, did most of you single table until you were comfortable, or did you make yourself play more than one table?