This is fucked .. whats your opinion?

Alright ... dating this girl for 3 years .. planned on gettin married ... whatever .. anyways. So we break up like 2 months ago ... pretty nasty break up ... well last night im out with this girl , kick ass girl , much cooler than the last .. ne ways , so we stop at the store to get a pop ... as were leaving I see my best friend at the light ... so i wave him down and we start talkin.

Jokingly ( we were in the area of my ex) I say , what did you just leave her house ... he says yeah man but dont worry , were friends its no biggie , nothing happend.

well i dont care if nothing happend , regardless , do i have a right to be pissed ?

Him and her are tellin me no ... me and my lady friend are saying yes