Am I curious, confused, or just need to study the bible more often?

I am going through a frustration time right now with family members. I know it is the right thing to do to help others when they are in need. But when can you say"No" or " I dont want to help you because of the things you do".? Which I do know the answer to, but you are welcome to respond,lol. I havent heard from my mom side of the family in years. Now that they are in need, me and my mom are there for them especially my mom because its her sister. My cousins lives a lifestyle that is not acceptable for me, so I don't want them around me and my kids at all. To make a long long story short, I am kinda rude when I see them, I speak once only to say hi. I have my reasons. One of them is I can't stand their lifestyle and I don't want my kids to be around them. I asked God to please forgive me because I felt bad. I am no better than them and God wants us to love others right? They are adults with no manners, they think they can do what they want because "we're family". When I say something or try to correct something, Im the bad guy, lol. I don't think its funny, but its like when you think you are doing something right and it turns out to be wrong, I don't know. The only thing I see that I need to do is step back and remove myself. So there won't be any confusion, I am basically trying to "protect' my mother. She is a sweet woman and easy to get over. If anyone understands what Im trying to say or can relate. What do you think?