I think my classmate claims I'm emotionally abusing my spouse.
What is your reason for thinking your roommate believes something like this to be true?
He told me this straight up. He also blames me for pretty much everything.
It is wrong for people to inject themselves into someone else's relationship. You should avoid him or cut him out of your life if it will ruin your relationship.
I agree. I don't see him or speak to him anymore.
If you think his advise is true however than maybe you should think about trying to change your behavior. Either way, I do not think it is right for him to try and involve himself into your relationship like that.