The magnet is mostly a very positive meaning dream. You are the person who is able to draw up the things you wish to have. The magnet is also a symbolism of your tendency to attach with things or people that are very dear to you. Perhaps the dream is only the reflection how important they are to you. On the negative note, the magnet shows that you attach people or situations that are not favourable to you. Beware of that.
Dream dictionary: Magnet dream meanings
…Dreaming of a magnet, denotes that evil influences will draw you from the path of honor. A woman is probably luring you to ruin. To a woman, this dream foretells that protection and wealth will be showered upon her….
You will be under the influence of people whom you should mistrust.
You will exert a strong attraction and dominance in certain person, with who you may initiate new friendship.