Has anyone taken caffeine pills to lose weight? just curious

Never, ever, rely on chemistry to lose weight. Just don't
It's not healthy, in fact it's the complete opposite. For once you could become sick, on another part even if you do lose some weight through them, as soon as you stop the yoyo-effect will take place and then you're back at your previous weight, most likely even a bit more.

Try other things, if you don't got the time for sports, which is fine, then take care of your food. Don't eat "heavy food" late at the evening. In fact don't even eat at all at late hours... Don't eat "big meals" eat several smaller meals throughout the whole day. Drink a lot! Really this helps, but take care of drinks, too. As for myself I rely on water and milk (well cacao / chocolate milk...) and it's fine :P

And as you've mentioned: Grant yourself some days off... some days without any stress at all. Just shut down for a day and get some energy loaded again :P

Have you tried some good old fashioned exercise?
I know its tiring and hard, but you lose weight and look more toned at the same time.
Most guys don't want a complete stick, some nice tone makes any human being look amazing.

no and this doesn't sound like a great idea either

i've used caffeine pills. I lost like 2 lb but I was taking like 10 at a time (really unhealthy)
and then when I stopped taking them, I ended up gaining the weight back plus an additional few lb =S