I will pass this saying on toj you, my mom says it... "I am as proud of the people that do like me, as I am of the ones who don't" She means she usually doesn't like them either... she won't miss em, & they weren't worth it, & if she was rude - They deserved it. Adopt her belief, it has helped me my entire life! We don't have to be liked by everyone, just be proud of who you are! Be you & follow your morals :-)
As it is said, Self Analysis is the Best Analysis. So dont completely ignore their points and give it a thought why did somebody say like that. If the ponts make sense, you should take it positively and work on those. Also, be thankful to them because not everybody points out the negative points.
You say: " im really sorry to hear that. Please let me know if there is something I can do to change that. I hope we could be friends someday..... God bless you and your family".... Then walk away..... THAT!, is class my friend....
It depends, is it a I don't like you at all, or I don't like you relationship wise? If it's an I don't like you at all, all you can really do is accept it. If that person doesn't like you for you oh well. If they start making issues though, then you can say to them : "Look you may not like me, but you aren't going to disrespect me in my face. I don't do it to you, so don't do it to me." And just leave it at that. If it is relationship wise then again, you just have to accept it. Hopefully you, and that person can still be friends.