Why must you do that?
Why must you friend with someone with reason?
Why must you be kind to people when you need something?
Why can’t you be sincere?
It’s a bad thing not to be sincere in relationship. Whether love or friend relationship. It will hurt other person to know that you are not being sincere with them.
Why can’t you just accept the person the way they are? Why can’t you just be nice to everyone, every living thing in the world?
I always accept people for who they are but it takes a special person to be nice to everyone all the time. I only wish I could manage that. I try my best but some people are just so rude or selfish that it's not easy to be nice to them.