Sorry for multi-post, my phones stupid:
Learning other's boundaries is ok, bcoz it teaches you how to get along with them, and may even teach you how to enforce your own... You aren't a little girl anymore, so you are not being scolded. Its important that you make an effort to learn the difference... And Lee is right, time does provide some extra layers of skin to protect us, but in the interim, try reminding yourself that people are not attacking you, you dont need to go into defense/hide mode.