Why can't I seem to get them out of my mind?

You are either in love or deeply infatuated with this person. Whatever it may be, you have to ask yourself "why don't i want to think of them?" once you answer that, everything else should flow naturally.

Moments are memories stored within the brain. This causes . what seems to be, the never ending cycle as your brain refreshes through them when your mind wanders. These memories are often interpreted as good ones, hence the ones you would miss. People also tend to want to go back and live in these moments for the nostalgic purposes, thus resulting said person to appear so often in your mind.

I have heard and experienced many times the saying, "The first person you think of at night and last one at night is either the person making you happy or making you upset." First things first, do you know why they are on your mind? What thoughts do you have when you think about them. If the thoughts you experience are negative, consider finding a way to relieve this negativity such as talking to said person about the issue. If your thoughts are positive, consider a what to do as a reaction to these. Over all though, no matter what anybody says, it is up to you to make a decision or i one is even necessary. Have a great day!

How about you tell me who the "them" is and, if you're comfortable, sharing your experience with the "them" and your feelings towards "them". Sometimes we just need to talk it out of our minds.

Focus on the needs that this person was meeting instead of the person themself and be creative in seeing how you can get those needs met in other areas of your life eg. companionship, support, love

How is it possible to push someone out of our mind once we have started caring for them? when that love, care, friendship we share with someone is true...it's for forever, even when that person is not in our life anymore. But hey, that doesn't mean that you cannot move on...you can still enjoy your life, let more people in. It's all upto you. take your time, there is no rushing this process. When you are ready, you'll know it yourself.

Its different for everyone but maybe you had a large emotional attachment to them or the made an important and/or changing impact on your life.

bz we cant forget stuffss, we can just get use to...and doesnt care anymore at distrubed thigssssssss

I believe it can be caused from stress of that situation. Thinking about it can cause stress, or the situation was stressful itself. I suggest trying to face the situation head on, and trying to fix it. If whatever or whoever is on your mind, you can come to terms with it, and things can be fixed very quickly, and peacefully. But in all honesty, it comes down to you. If you are willing to face whatever or whoever is on your mind, and if you have the courage to face the struggle, even if there is some loss that you could possibly struggle with. But there will always be more strength than struggle alone. I'm cheering you on, either way, and what choice you choose.