Tara

If its ok I'm going to give you a few pointers without sounding like a know-all.

If I start with the lighting as you are experimenting with it:
~ The lighting on the girl is good, she is well lit and you have a good catchment in her eyes, there are no nasty shadows, although her hair on the right side could have been lighter by using a reflector.

Poses If I were taking a photograph of this particular model, I would turn her slightly rather than having her facing the camera full on. The reason for this is because she has taken most of the frame up and looks very unflattering. I doubt that she will appreciate this look. Turning the model slightly will be much more flattering and she will not look as large, I do not mean that in an offensive way, it's just how people look when taken facing forward full on.

Then I come to the guy bending down. I would not have him in the shot what-so-ever. That pose has totally destroyed the image. I will give my opinions why:
1. He is bent over the poor girl like a sack of potatoes and it looks like she is taking the full weight.
2. It's not showing him in a good way at all, to me it looks like some type of pervy bloke trying for a kiss off a beautiful girl. He is also in deep shadow and in turn causing a shadow on the girl.

I'm not sure what it is in the bottom right of the picture, I'm trying to work out what the white and black bit is. I assume it's the guy's arm. I would clone or paint that bit out and leave it black as it looks strange.

If you wanted the guy in the shot then I would suggest that you have him kneeling down slightly behind her. She will be turned slightly and his arms would be gently placed on her shoulder. Then he would be giving her a slight peck on the cheek.
Set the pose first then sort out the lighting.

One more thing, I guess you are whitening the background with the Dodge tool and setting it to highlight. There is no problems doing this at all but to me the edges look to crisp and in some places they have burnt the models. This is also the case for some other images in your portfolio.
If you are going to do this method then set the exposure to 30-40%, (assuming that you are using Photoshop), this way you will not burn the models as much. Be careful of the skin and hair especially if the model is blonde.

As I always say, these are my opinions and others may disagree but I am a professional in this field and have had a lot of experience with different methods of lighting.

Hope this is of help to you

Paul

Ime no Pro but I agree With paul, Good lighting but the guy wrecks it.

If you wanted him that way I would of got him "kissing behind the ear" so you got some of his face in.
Her pose I dont Know, Despite the fact shes head on I like the way her head is but maby would look beter with a slight twist of the body to the right I dont know.

Also agree with takeing the black out of the bottom right dosent look right and you are takeing away from her hair.

Portraits are hard to get right and ime very much a novice, these are just my opinions but keep trying!

Lovely model btw!

Thanks guys really good stuff thats why I post the pictures
Cheers
Mike