It's not easy dealing with paranoia and yes it can certainly affect our relationships and challenge our thoughts. I'm not sure I have the solution because I have experienced extreme paranoia with my husband in the past. The only way I get by is to remind myself if there is no proof it simply doesn't exist. And to keep focusing on the positives of what he does do. There is heaps that he does do that would dispel the idea of what my paranoia conceives him to be doing.