You probably do need new friends if all that connects you to most of your old ones is drinking, yes. But with the unfollowing thing - if you want to be opinionated and express your 'contempt' for things you disagree with, you have to expect some people to disagree with you. Most people would unfollow somebody whose posts they don't agree with and don't feel are tactfully expressed. It's just the nature of social media that there will be clashes and retreats.