How can i increase omega 3 intake without omega 6? is that possible and does it matter? eg walnuts have 4x omega 6 than omega 3

Possible, however...: Yes, this is possible. The average American diet has far more omega 6 than 3 but not all o6's are equal-no real need to limit the essential o6 GLA. Vegetarian sources of o3's like flax, walnut & hempseeds tend to have a healthy balance of essential o3 ; 6's but fish & fish oil have much more o3's than 6's. See http://www.drweil.com/drw/u/QAA400149/balancing-omega-3-and-omega-6.html for more info.