Hi there!
You say you were trying to get a blurred background, what aperture were you using?
I actually saw this lil article on depth of field yesterday, you might find it helpful
http://digital-photography-school.com …te&utm_campaign=hootsuite
Just looking at these, I think you should try spending a little more time thinking about how the background will effect the end photo. Look for simple backgrounds, if there was a part of the beach with no people, or a way you could have positioned your subjects so there were no people, that would have been much better IMO.
Think about the lines the objects are making, that jetty in the first two photos is cutting the photo in half and then you've got all these other busy bits ontop/behind the jetty. and then in the 4th, it's just this black distracting thing in the corner.
Number three is most distracting as you can just see a bunch of people right there, and the intended subjects are actually leaning towards them, drawing your eye to them. Have you heard about leading lines? then there's the guy in the pink and he's walking towards those people, drawing your eye to them even more!
The last photo is the best IMO, the subjects look nicely in focus, they are nicely proportioned in the frame and I really like the composition, the line of the clouds and the hirozen and drawing your eye to the subject, as well as the line of buildings on the right also drawing your eye to the subject. I didn't even notice the man laying down behind them, but you could clone him out as the beach pebbles are fairly consistent. Just watch for "things" popping out of people heads and bodies, branches, poles, other people! etc....
It tells a nice story! However, you haven't really got the "blurred background" effect there >_<
The best thing about your photos are that there are no noticeable shadows on the subjects face. That's brilliant!!! Keep that up 