There are currently 3 projects to put astronauts up to the station. 2 have already used basically the future manned capsule to resupply the station with food etc.. They are being understandably cautious. But it wouldn’t take much to finish the manned system
The 3 systems under development are the SpaceX (manned) Dragon, the Boeing CST-100, and the Sierra Nevada Dream Chaser. Of these, only SpaceX Dragon has performed unmanned supply missions to the ISS.
The other resupply system - the Orbital ATK Cygnus - is just a pressurized cylinder with no re-entry protection whatsoever. Furthermore, the Antares-100 rocket it usually rides up in just blew up destroying the cargo last October, and the planned replacement (Antares-200) will still rely on a Russian engine.