Quite a few shots look like they were taken with a cell phone. I would prefer to remain positive in the advice that I provide, but I will say that gear is very important. If you don't have a lens that shoots at f2.8 or faster, you'll probably want one to build up a general portfolio. Improvements could be made to composition, technical camera settings, editing, and other things. I see promise in the way things have been composed, and some fair direction for poses of the subjects, but lots can be improved.
When you view the images on the site, their titles pop up below them. I would remove that entirely. "IMG_0715", etc.
If I were to give a couple pieces of constructive feedback, I would say these things:
- A lot of the shots might look nicer with a shallower depth of field. For your portfolio, it would be nice to see some shallow depth of field shots.
- For the image of the guy in the red sweater holding hands with the pregnant woman walking over the bridge/walkway, I would have rotated the camera and shot vertical. I would have taken about three steps backwards and kept the same angle, but gotten the feet in the frame. I would have shot with a fast aperture in the range of f1.8 to f2.8. By doing that, you would remove some environmental distractions while keeping the bridge and scene in the shot. You would remove more distractions by having a shallower depth of field. Having the feet in the shot would add to the whole story of what's going on, and having the shot upright would keep the primary focus on their facial expressions and hand-holding.