I have been trying to grow my hair out for about 2 years and it literally doesn't grow. I only trim it every 3 months if even that and it's usually less than a 1/2 an inch. It's very dry and brittle and breaks off frequently. When I wear dark colors, you can see bits of hair on my clothes around my shoulders that looks as if I have just gotten my hair trimmed. I was using a flat-iron everyday, but now try to only use it 3-4 times a week. My hair is very gross and frizzy when it's not straightened. I've tried numerous products to try and make it grow and not break off, including, hair vitamins, leave-in conditioners, shine, moisture and conditioning treatments, oil treatments, and trimming my hair. I even use the deep conditioner Redken, Butter Treat daily, but nothing seems to help. My hair is all different lengths and I don't know what to do with it. It's shoulder length and I just want it a few inches longer and all one length, but it keeps breaking. Please help so my hair will stop breaking off! Thanks.