I agree with that French Poet Chamford has said : "In the world, you have 3 kinds of friends : yours friends that enjoys you, yours friends that doesn't care about you, and yours friends that feels hatred for you."
It's necessary to have friendship but we should be confident in ourselves for choose ones we deserve. Especially we ought to know react as well we may have to do, depending on these 3 kinds of friends we used to meet. Or we may be often fooled in false feelings.
At least, on Italki, you can learn in exchange a language. That's a good business for find out real friendliness and not be disillusioned.