What does it mean if you can feel someones presence?

Anonymous
e. g with a person you are attracted to, say you were sitting down in a room with your back facing the door and you suddenly get that churning feeling in your stomach and it turns out they had walked into the room and were walking in your direction, and stopped next to you - bearing in mind you didn't even know they had entered the room. and if you felt a 'charge' or energy near you and you look round and realise the person is next to you -
What does it mean if you can feel someones presence?
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