Okay here is the thing. The model looks good so far. When you work with polys there is no way that you can attach vertices without adding geometry to complement for the added geometry. The only way to fix this is to erase some of the geometry. You don't need that amount of detail on the face. You always got to start thinking in low polys. Taking a closer look at the face I can see many edges that can be erased. Think of modeling like a stone cutter. You start with a big block. You reduce the big block into medium shapes, then into small shapes. When you're at the end, that's when the sculptor starts with the detail. Don't skip these steps and jump right into the detail. Took me a while to learn this.