1- Be creative and attract their interest. See what discussions/topics they like and bring them up in family gatherings. This helps restore a better family environment, and once the gatherings become more interactive, you will love them more.
2- Recite this verse ((Taha 39) numerous times a day with the intention to have Allah increase your love for them:
وَأَلْقَيْتُ عَلَيْكَ مَحَبَّةً مِّنِّي وَلِتُصْنَعَ عَلَىٰ عَيْنِي
3- Read this Du’a for your parents:
4- Yes you can take a break and go to your aunt’s house for a few days provided that you don’t upset your family. If they will be upset, hurt, or this will create tension with them, then you should not. But if they are ok with it, then yes it is a good idea (after trying the first three recommendation).