Just sharing some of my views about your photos.
Photo No.1 - Too much headroom on the top of the frame. Would have crop more. The background is slightly distracting. Colours are warm and nice. Shot during sunset? This is the only photo which I find the model communicating with the camera.
Photo No.2 - Too much angle. Would love to see more of her face. Colours are again nice and warm. Would have crop less and see more of her face and less background. As the model's face is turn too much away, so there is less communication with the camera.
Photo No.3 - Not much happening. Just a shot of her bending over to grab a stone. Would have love to see her eyes on the camera. A little too much room space at the bottom of the frame.
Photo No.4 - Nearly executed very well. Just again too much room space at the bottom of the frame. Would have crop a little tighter. Prefer model's eyes to look away towards the water.
Photo No.5 - Slightly dark. Nothing much going on here. I guess it's another snap shot of the model walking on the tree trunk. Would have use a longer lens to created more DOF. Background to distracting.
Photo No.6 - This is a good shot. Eyes on the camera. Nice warm evening colours. Would have ask the model's head to tilt a little more towards the left side of the frame to fill up the space. Good use of lens which you manage to create DOF.
Overall, I would say your overall composition can be improve. Colours are nice and warm as you manage to spot the exposure well except for photo no.5. Did you shoot on DSLR? What you need to to communicate more with your friend to make her eyes communicate more with you.
thank you....