For composition, just a few I can think of by a brief look :
1) there is no main focus. Is it the couple, the statue or the birds in the background?
2) the people and statue are a little to close to the left or right edge of the frame.
3) the foreground grass patch is probably superfluous and a distraction. As a result, the couple is not at an ideal position in the frame.
Considering the above, I'm wondering if a landscape frame would be better.
4) the birds are too out of focus. It has to do with insufficient DOF (without the EXIF, can't really pin point what changes can be made). You may need to stop-down your aperture to get more DOF if you want the birds to be in focus too.
5) Is shutter speed too slow to freeze the birds in the background?
5) One of the human subject is cut into half at the left edge and, as humans subjects are seeking attention of the viewer, it's distracting.
6) The statue colour is too similar to the sky colour and therefore has a tendency to blend into the sky and doesn't stand out, both in terms of colour and subject size.