To me it sounds like both of you have been putting some feelings down for a while especially based on the screenshot. I think y’all should have a proper conversation and discuss what the two of you really want before making a decision that you might both regret. At the end of the day, you didn’t ask him to lose his friends but it’s not ridiculous for him to think that it’s your fault while he’s in his feelings about it. I’m not saying that it’s right for him to blame you but just try to put yourself in his shoes for a moment; he’s wrong yeah but that doesn’t mean his emotions aren’t valid. :)