I have a really bad history of accidentally leading on guys I haven't meant to, and breaking their hearts in the end. How do I know if I'm flirting with a guy or not? Is a lot of laughing ALWAYS flirting? What if I just love to be funny and laugh? I guess being a joyful person has its downsides too, haha. How to make sure a guy knows I'm not interested? (I feel like I'm too nice sometimes, too.).