Which lens should i pick for nikon d3100?

Ok i love portraits with awesome bokeh and i want to take great pics of my kids playing ect and close ups. I have saved up and really need help on making the best decision for a lens. What is my best option with these 3. 50mm 1.4, 105 2.8 macro, or the 18-200 vr. Which one will be the best in your opinion that i would get the most use out of. I'm stressing because the more i read the more confused i become.

Added (1). Something i can go to wedding and such and get really great pics.

Added (2). I didn't say i couldn't take nice pics with the 18-55 i just want to add a nice lens.

Well the 18-200 mm lens it a great single lens solution and is one that I use about 80% of the time when shooting editorial assignments. That wold be the one I would pick

The AF-S 50 mm f/1.4 is specifically a portrait lens or medium telephoto lens

The 105 mm f/2.8 macro is cool but is used for macro photography.

So you need to pick the one that you think you will be using the most and buy it as your next lens.

If you can't get good pictures with your 18-55, buying a new lens won't change anything. Spend some time reading a few basic photography books availible at your local library. Your D3100 is capable of taking excellent quality photos.

You mentioned awesome bokeh. Only one answer. 50mm f/1.4