Flirting without realizing

I have this problem too and have been told by two boyfriends that it makes them worry about me. I think two things about this: First of all, I think zygote is right that "flirting" (smiling, laughing, open body language, eye contact) when it's unintentional comes from deeper emotional issues. In my case my boyfriend and I decided that it was related to "daddy issues" (I really hate that term, but it's a useful one because we all know what it means). but there's another point that most men don't really understand. It's that girls are socialized to defer to men. Boys are taught to be leaders and girls are taught to be followers, and if you have a compliant personality, you are more susceptible to such socialization. Men and women talk and listen in different ways. When men interrupt a speaker, it's usually to change topic or add a new point of view, but when women interrupt a speaker, it's usually to agree with him or her. Although I get that there is an immediate reality in the flirting dynamic--that is, your smiling and active listening is perceived by the guy you're talking to as being interested in him--there are also social forces at play that make this NOT YOUR FAULT! To some extent, you're just doing what every other girl is socialized to do--the only difference is that you're taking it too far. There is nothing wrong with you and this is perfectly harmless and normal. that being said, you do probably need to change your behavior because as people (and women moreso than men) we have to adapt to social norms in order to fit in. My advice is this: when you meet someone new, just try not to smile too much, watch how you're standing, and act disinterested in what they say. Don't over-correct too much, but just do whatever you feel comfortable with. Eventually you want to reach a balance between being your flirty self and presenting a socially acceptable demeanor, but just to get a feel for not being flirty, try this a few times: act like you're only talking to a guy to be polite and that you're actually trying to get out of the conversation as quickly as possible. Afterward, ask your friends or your boyfriend how you did, and get their feedback. With just a tiny bit of practice you can easily control your body language. Good luck!

Try to control that because you'll have problem in futur relationships 'cause it's pretty hard to REALLY trust (like let the ''flirty'' one go in bars alone and not worry) someone flirty in the long run because to the eyes of the others you're trying to seduce every guy you talk to.

It gets f*cking annoying. Like at first it's okay but when you can't go out with your partner without having to see him/her seducing someone else you just get plain ''sick of it'' and want to find someone that won't make you feel like they're looking for the next one.

Some girls who flirt do this because they are insecure, and others have issues with their dad (i.e. daddy left when i was little, etc.)
You should make sure that you feel good about yourself and that you do not subconsciously seek approval from ALL men.
If you feel like this describes you, consider sharing these childhood feelings with your friends (and make sure to make it into a REALLY big deal so u get lots of sympathy.) If they are true friends, they will at least try to understand. You can also explain that the world feels different to you because of who you are and how this feels, but that you will try harder to be more "aloof" when saying "hello" to their boyfriends.
I know of one sure cure for this. What you do is that you flirt with a dangerous guy but MAKE SURE that you friends know that they are supposed to talk you out of it. You should also have a boring, "nice guy" friend who secretly loves you and who you can manipulate to "come rescue you."
This helps to create a safe space for you to explore your daddy issues without risking casual sex with your friends' bf's. But therapy and religion are far safer still, because unfortunely, girls with daddy issues lack the Amazonian-power to tame wild boyfriends. However, this can be learned, I am told. If you choose religion, know that (Jesus called God "abba" which means, "daddy.") It is a good idea to cycle between both extremes; this make you more interesting to guys. I am a guy. =)

OMJ this is the exact same story for me. My friends even think that I lie when I tell them that I wasn't aware that I was flirting or that the other person was flirting w/ me. Am glad am not alone on this one ;)

then they are probably just jealous girls who are mad cus you get more attention screw them

same happens to me

Yea you probably are, but understand that this can be hard for people to deal with when they're not. So they might be annoyed by it because flirty girls obviously would get more attention then someone that just isn't a naturally flirty person.

Flirting means different things to different people. So it really depends on wat exaclt you've been doing that provokes such a reaction. Besides, look at the positive side of things. If it's of any consolation, you'll never have to worry about not being able to send the rights signals to the guys you fancy.

Tell them to actually describe your behaviour and that of the other person then decide for yourself if it deserves the label "flirt."

OMG the same thing happens to me. I've even been acused of flirting with friend's bf's and I get so upset because I know in my heart that I wasn't trying to flirt. Or sometimes my friends think I'm flirting with some guy and even though I tell them I don't even find him attractive they think I'm lying, it kinda sucks but oh well, can't do anything about it.