Help!! whenever I'm near my friends Lauren and Shannon,they feel like they have to puke!!?

I am with them everyday of my life, like kinda legit. Everytime I am with them they feel like they have to puke!! Like they shake,and lay around like dead people. Do you think it has to do with me?? ARE THEY LIKE ALLERGIC OR SOMETHING TO ME?? i really can cry, i make my friends throw up wahh. WAIT DO I SMELL??? omg help people!! What can i do to make them stop throwing up!?!?!?