I'm tired that men like to use me for sex, please give advice.

I'm a pretty woman (29yo), nothing to complain about in this department. <br>I'm a very open person, so I like to talk to a lot of people at work, be friendly and then I like to go to parties with friends. <br>I'm really enjoying this life and I'm having fun with it. <br>But it's been the third time this year that I went home with a strange guy from the party. <br>We go out for drinks, we spend some time together, but I don't want to talk about anything too private about my life, because I just met this person, so I don't trust them 100%. <br>But then the guy usually says that I'm a cold-hearted person who only wants to have sex with them and that I'm a woman with no honor. <br>I'm a woman with no honor because I want to have sex with him? <br>These incidents make me feel very bad. <br>Please give me some advice on how to behave properly as a woman.