I feel like an clown

So i am in a relationship with a guy named let's just put his first initial which is P , so me an P dated well over a year and a half and today with my best friend (K) we planned to do a royalty test basically my best friend would ask him to be his sneaky link and would flirt with him etc... So we would do the test and he basically said i had feeling's for you to, i only dated Valentina (me) just because off you and bla bla bla and he said yes. I don't know what to do , should i break up with him i am just mad rn like i don't know how to Express in how much rage i am .