This is not kufr but it is a major sin! You have to train yourself to live with your kinship as you have no other choice! The defect is in you and you must change!

I wonder sometimes if I am a Muslim or a kafir.The reason is that I do not and cannot get along with any of my family. I know up holding the ties of kinship is something that Allah and His prophet have enjoined and I do not deny that doing the opposite is haraam, but still there is nothing in my heart that wants to get along with them, neither for the dunya nor for Allah’s sake.

Fiqh of the family | August 4, 2015 6:23 pm
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I have an uncle who molested my older sis when she was a young girl and I was also molested at a young age by a cousin. Me and my sister can’t stand them by she doesn’t express it the way I do. When they are over at our place I tend to be cold and ignore them. I know it’s not right to behave such way but they were molesters. We should be nice but i mostly have a hard time being nice to them. I can’t stand them. I even told my father to never invite them if he cares about me and my sister. Was it wrong for me to tell him that?
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I am divorcee with a 10 year old daughter. I got a proposal from a pious and practicing man (also a divorcee). He has a 17 year old son. The proposal is good, however, we were only considering, will my daughter and his son be Mahram to each other after our marriage? If not, do you suggest for this marriage to take place, since his son will live with us? Also, if we do get married and I bear children and if they are females, will they be Mahram to his son?