When to bottle

Im on my second batch ever. Im only brewing a gallon but The first time I didn't even get to drink the beer because every bottle foamed out upon opening. I posted that and believe it was from an infection and not over carbonation. I'm concerned now though that I don't want to bottle too early. It's been fermenting for two weeks now and actually want to drink a beer I've created. Should I wait longer. Still seems to be bubbling out of the airlock. Should I wait till no activity or is that too long.

If you do not already have one, get a hydrometer. You need to check the gravity reading and then check it again a couple days later. If it stays the same, it should be done fermenting at the 2 week stage.

Klotesox said:

...Still seems to be bubbling out of the airlock. Should I wait till no activity or is that too long.

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Yes, wait.  Sitting a couple more days or even another week can't hurt.  Are over priming maybe?

There is a way to tell if your gushers were a result of an infection or overcarbonation.

Rings.

Hold a dirty bottle to the light and look for ring(s) in the neck where the beer level was. If you see a ring then you can be positive that you had an infection.
Every gusher I've had had a ring or two in the neck.

As far as knowing when to bottle, what bigchicken said is the way to know for sure. 

Personally I wait. I brew it faster than I drink it, so I'm never in a rush to bottle (in my case keg).