My girl firend wants me to drink???

ok well basicaly, my gf, shes no drunk or enything but she has a few at new years ect, ive alwasy been uptight about drinking, i dont think people really need to get drunk, she wanted me to drink like 1 gl of wine for our 18mnth aniversary, but when i tried to tell her i would have 1 but didnt want to get drunk, she thought i was calling her a drinker hu like gets drunk all the time and she is making me feel really bout it and she dont believe me wen i say it was a misunderstanding??? help!!!!!!!!