My brother has married, but i couldn't face his wife as my families, i confused.

You're not the first one in this situation,and you won't be the last...Did Your Brother get married very quickly,as You seem to feel her to be an outsider still,and not like You had gotten to know her over time to be able to accept her (yet) as a SIL? Are You close to Your Brother? Is He Younger or older than You? Will they be living nearby,or moving away somewhere else? There are so many life changes that a family member getting married can cause,and it's hard to know how to deal with some of them.He's starting a new phase in his life with Her.He's Still Your Brother,but it's entirely up to you how much you want to be there for Him now.All I can suggest is that You get to know his new Wife,if you don't know her well already.She could become like another sister for You... (I'm hoping that would be a good thing!) Good luck!