I am not looking for a serious relationship at the moment. The people I flirt with are mutual friends. They don't hang out with each other at the same time when I flirt with them. Occasionally there is physical contact exchanged. I feel bad flirting with various people because I had past experience of being lied to.

Do you have any type of commitment to anyone? If not I would say flirt on girl. Single girl flirting nothing wrong with that and you didn't say how old you are but I am guessing pretty young. So what your doing is completely normal. Have fun if you're not looking for anything serious its your right because like the great Cindy Lauper said "Girls Just Wanna Have Fun." just make sure its clear to whomever you're flirting with that you are not looking to get serious.