Struggling with Trust and Paranoia in Friendships

I have recently discovered what splitting means. And I’ve also discovered that I do it a lot. I’m doing it with my friends now. I’m finding it hard to trust them even though they say they care about me. I only have two irl friends and recently, they have been, in my mind, upsetting me to no end. I’m starting to think that they don’t actually want me around and the paranoia is getting to me. I’m not sure what to do. I’ve confronted them about it but their assurances are getting harder and harder to believe, especially with their recent actions. I don’t know what to do… I want to isolate myself from them but I know that if I do that, I’ll drive myself crazy. They don’t talk to me like they used to. What should I do?