I'm thinking of cutting a friendship
What is the main reason that you are wanting to cut the relationship off?
He has no potential to be a great companion
If you are sure then it's okay to end a friendship. It's important to have friends that you can relate to and also mutually beneficial. Otherwise, the person will only drag you down.
I'm not sure about it. I'll make a decision after some thought.
I think that you should really think it through. If you are sure, then it is okay to end the friendship if it is no longer working out for you.