I do think your bfs made their cases. Trusting is not other

people's problem, but your problem. If you are not secured, and you don't have the strong evidence, it would be unwise to blaim others for your suspitions. And it is very harmful to the relationship. I had been blamed by my ex long time ago, and I will never forget it. Trust is always you trust other or not rather than he makes you trust him or not.