Why do I always let the voice in my head overpower the words of my loved ones?

Because you're worried that even though your loved ones mean well, they really don't understand your predicament well enough to offer helpful advice or insight. So, you discount their words, which leaves you just where you began.

It may be because since it's the voice in your own head, you're more likely to listen to it since it's your own, and you probably think since you're listening to yourself, you're right. however, that's not always true and the words of your loved ones maybe more valuable than those of the voice in your head.

With my eating disorder, I noticed that the voice in my head was so much stronger than the voices of people I loved because I didn't full trust them. I had to work on my trust problems beforbi could fully accept their words

This isn't that uncommon. When I suffered from an eating disorder, the words of my parents didn't do a thing compared to "Mia's" voice. The best thing to do here is to tell yourself over and over again, however long it takes, "Their words are more important.", and take it to heart. Don't let your head control you.

The voice in your head is the one that guides all your choices and decides what path you will choice on your journey.

I think the reason why that happens is that the voice in my head is closer to my ear than those of my loved ones. Also, sometimes all my loved ones are lost in a crowd of untrustworthy people, and simply finding them takes up all of my energy.

Try to identify your core beliefs. Once you find out them you can try to work on changing them and in that way get rid of the ''voice in your head''.

the voice feels close to me plus it feels like it tells me the truth and my loved ones seem to lie at times