need to get jealousy issues resolved

Girlfriend and I have been dating for a year and a half. She's 20 and I am 22 male. i was having a wonderful afternoon with my girlfriend but after lunch i tried telling her a story about a conversation i had with my male and female friends and she turns on me and yells, "Why don't you go and fuck her already."I turn to her and call her a jealous bitch because this isn't first time this happened, as she continues and talks about how i always check out girls, and we proceed to drive home. On the way home as she is driving I tell her i cannot stand her jealousy and that i'm over her. She goes silent and leaves me stranded in a parking lot 45 mins from home. what should i do?