I've been stuck in my mind with past memories and people. I tried my best to let it go, but somehow it doesn't go. It's killing me a lot, i dont know what to do

Is it possible to get mentally attacked by enemy through loved ones? there's people who I KNOW wouldn't even think of saying those bad, agressive, hurtful things to me. as they explained, they said that they start feeling a lot of negative energy towards me, and feeling like someone tells them...

i was thinking about dedicating my soul to Satan for a long time. I read a lot, i spend a LOT of time researching, and reading about Satanism, religions and stuff like (my passion). Today, I had very bad morning, and it was tragic, i was panicking, didnt knew what to do, so i rushed and mixed...