Ex man

I dated a guy for two years I found out he was cheating on me with my best friend I waited for some one to tell me it took 2 months for a girl to over hear they where going out later found out that everyone but me knew...kinda feel like crap but now I’m starting to dread talking to anyone who didn’t tell me should I be mad or forgive and forget.. still kinda mad I wasted two years on trash