I want to compliment you on your courage it takes a lot of self control. You say that you are easily influenced I would like to make a suggestion to you, Your only a teenager and you see that you have this nisoyan of being a good looking girl from Hashem you should just know a girls main mitzvah is tznius and if you keep this Hashem will be really proud of you. You must learn to say NO and stare the guy down in the eye, learning to protect yourself comes with this nisoyan and these are the times when Hashem would want you to say NO and if you must be rude or nasty to get out of the conversation or situation your in so be it that is what Hashem would want from you. I used to think Hashem would want me to be a nice person and please everyone in the world i found out the hard way, its not worth it trust me i wish i was as strong as you are, and dont do anything you will regret.