>>336595048
because your unconscious mind and your intuition are not screaming red alert at their behavior, usually people have a certain gut feeling about people even if they can't quite put their finger on what is off about the other person
if you trust someone they most likely have earned your trust and have not exhibited behavior that would arouse suspicion on their true motives, that and being open with you could have put your mind at ease and convinced you that their intentions are to be with you for real