sweetie, I've travelled through Delhi, it could be too hot for many folks from Nepal. It's OK but try to be in a group. They really do not care as much as they used to 10 years back (in terms of harassment) but they have beefed up security. The worst part is our Nepali guy in charge of ticket clearance. So trust them but do verify (I had a very bad experience about 9 years ago; the guy sold my ticket to another passenger thinking I was not travelling (??) and had to wait 12 more hours at night). They have a very good restaurant inside the airport, I think, called Raja or so.