I'm thinking my friend is ignoring me and I feel like calling them out for doing this.
Why would you call them out for ignoring you?
Because I want people to be honest with me.
It's understandable to be frustrated with a friend, but you shouldn't call someone out unless you have proof. They could just be busy or have other things that require their attention and may be unintentionally ignoring you. If you call them out and you're wrong, they may be insulted by your accusation.
I'm not wrong. I have proof that he's ignoring me, I saw him doing it. I called out to him, he looked at me and went the opposite direction.
That does sound like he is ignoring you on purpose. Then you should confront them about this to get a clear answer.