NCstudent2020

Hello, I am in my second year of college, I am almost done with prereqs for the BSN program. I have a group of 3 friends who I am close with. However, I seem to always make better grades than everyone in the group. It doesn't make me better, it's just a fact. They seem to have changed in how they treat me. It's almost as if they don't like me anymore. I never try to brag and I offer to help them whenever they need it. It just seems that I'm the only one who ever comes to study "groups" or does the work. I get called a know it all and I feel like I have to dumb myself down or not speak up in class so I don't seem like a nerd. I know it's silly but I'm just trying to be honest. I dont want to lose them and be alone. I want to help them because they're my friends but it's taking a toll on me. I feel like I HAVE to pull them through with me. Has anyone had similar experiences or any suggestions on what to do?