My friend has friend has bipolar i noticed she also tends to lie and is really immature for being 30. my question is this related to being bipolar?

The behaviors you: mention are not central to bipolar disorder but can be a byproduct of it. Emotional intelligence is a concept being taught and researched today byi Daniel Goleman and others. It measures and supports our ability to monitor and read our emotions and that of others and behave accordingly. Good for your friends' friend and the rest of us. Peace and good health.