Some people just aren't honest. They dont tell/speak the truth. And that's fine. That's who they are. They dont have it in them to tell people the truth so they make a story, a lie, or just ignore them. And that's fine. That's who they are.
Me personally I wouldn't recommend being friends with these people or associating with them. Because one day you will need them to tell you the truth or to have them give you feedback on a situation and you won't be able to trust what they're saying.
Its who they are. The world is full of them. Learn how to spot these people and ignore them.