C&C per req:
Given that it was a spur of the moment shoot, not bad, however since you've asked, I'll brink up a few issues I've noticed.
1. The image is about 1/2 stop under-exposed on the RH side. Neither subject is in sharp focus. It looks like the point of focus was actually her left forearm. His eyes give the impression of someone who isn't really into it, but putting up with it. Lastly is the background. Because of the pattern, brick walls like this aren't ideal, but if you are stuck with it, try and separate it more from your subjects to make it softer through selective focus.
2. More focus issues; she's sharp, but he's not. An ideal background this time, soft and mottled green, but again too close and too sharp. The highlights in her face are too harsh and she's squinting. If you're stuck with less than ideal light, move your subjects around to make the best of it.
3. As per 1.
4. Ummm.... Nice shoes?
5. A little too close for my tastes, but that's a personal thing. Watch the hairs that have blown onto her lips.
6. A number of issues with this one. As mentioned, careful with your backgrounds, ensure sufficient subject-background separation so that they're not both in focus. As well, you've got unfocused foreground elements (branches/leaves) which are very distracting. The branch that is almost touch his right shoulder is bothersome, and once again, he's not looking at you. A different crop would help this one a lot.
7. Two main concerns with this image are the deep shadow between them, and the branches in the foreground. As well, his skin tones are a little too warm.
Just my $00.02 worth - your milage may vary.
~John