How to change my cruse sense of humour?

[Roger That!]

I'm a teenage girl and I often get looked down upon by my peers because i find things hilarious that others usually find offensive. Everyone around me are so boring!!! People are often shocked because I am a girl and think I should be "ladylike". I don't want people thinking badly of me and I don't want to reflect a bad image about myself. Just like everyone else, I want to be respected and seen as a good person, but i just can't help but giggle at some things.
How do I change what i think is amusing? Isn't that programmed into me, unchangeable? I've already ruined some relationships because of this....