No, the aura doesn't attach it self on a per person basis.
Think of it like this: You are standing on a sidewalk, with people walking in front of you. Your aura will attach to some people, based on their own energy and aura. But, when those people walk past you and continue on, your aura does not stay attached to them. It may, briefly, come in contact with those people's auras, but it certainly won't attach itself forever.
Now say someone you really hate walks past you. Because you saw this person, you'd immediately think "Oh I hate that person" and your aura would send hate energy. If your thought was brief and the anger quickly subsided, then your aura would pull back to you and thus not form an energy link. BUT, if your thought lasted for several hours and and you kept thinking about how much you hate them, THEN it would form an energy link. It'd be a negative one of course, one full of hate and anger. This is where the strength of your own aura comes into play. The people who you hate and continue to hate may have stronger or more protective auras than yourself. This then causes your hate to bounce off their auras and right back into yours.
And once that hate keeps bouncing into your aura, we have a never ending cycle. You will never find peace (Or whatever comfort you are looking for) if you keep trying this. Your aura would never be strong enough if you keep charging at it, trying to get rid of it.
As an example with my own experience: My mother is a jew (not biologically related to me), and she had a horrible energy link attached to me. She naturally has a strong aura that causes hate and destruction where ever she goes and with my own aura being naturally weak, she attached herself to me. This caused all my hatred and anger towards her to do nothing, and it all came crashing back on top of me. This then caused me to hate her even more so, and I yelled and screamed that she wasn't listening to me and she had ruined my life and she was controlling me and leading me into destruction. All that anger I put toward her, did NOTHING. It did nothing and I was left feeling so helpless and dead inside. All that anger and hate came right back at me and it very nearly destroyed me.
So I helped myself and fixed my problem. I realized that she wasn't really doing anything to me, she simply was just being herself. And I had gone and created a huge problem between us that was caused from my inability to take a step back and look at what was happening. Over time i realized this. And I started meditating more, I worked specifically on my aura so this would never happen again. My aura grew stronger and more deflective. It wouldn't just repel negative energy from one person, but it would repel ANY and ALL negative energy.
So as for some people I know you hate/ dislike very much, I would work on de attaching yourself from them. Un bind any energy links (good or bad) from those people. It'll be like a new beginning! Start fresh and work on your own aura. Sadly this can't just be done in one day or a one time thing. I still hate my mother and our relationship hasn't changed (well, it has changed for the better but I still don't give two shits about her) but it took me at least 2 years to figure out where her hate come from, where my own hate came from, where the negative energy was attached, and of course, working to get rid of it. Even the good things. I just took my aura and cleaned every aspect of it and really just... gave myself freedom from people. Even those who I love I unbinded myself and made sure to avoid creating any new bad links.
Good luck!
