The phrase
i seem to use speech to let the reader know of things that i suppose be revealed by the narrator, is this bad? makes me worry that the OP is in fact using dialogue in the "As you know, Bob..." manner. How often do people really stand around and tell each other everything that has happened and is going on around them? This is what the narrator is for. Especially if 1. all characters involved are aware of what's been happening so have little reason to be explaining events to each other, or 2. the characters involved have no need or desire to know of what's been happening and so wouldn't be telling each other everything. Also, the characters don't always know everything that's going on, so there's the danger they could be talking about things they have no right to know.
An example of "As you know, Bob..." in action:
Character 1: Hey, remember yesterday when we went to the park together?
Character 2: Oh, yeah! Boy, that was fun! I loved when we swam in the lake.
Character 1: We swam in the lake for three hours straight!
Character 2: And had ice cream afterwards!
Character 1: I had the chocolate and you had vanilla. And then we both threw up!
(Such dialogue works only if the characters are prone to reminiscing a lot. It should not be used to inform readers of what they did yesterday when they went to the park.)
I'm sure somebody else around here can clarify it better than I did.

Lots of dialogue is fine but it's no crutch for narration, when narration is necessary.