WHEN THAT INSTINCT TELLS YOU THE OTHER PERSON IS 'BAD BUSINESS' TRUST IT! SIGNS:
1- most of the times you do what he/she likes
2- he/she is always getting you to do things for him/her
3- when you speak your refuse to do something or go somewhere the other person prefers, he/she starts the guilt trip on you and you don't even realise it.
4- slowly but surely he/she strays you away from the people who really love you
5- points out all the negative traits of your best friend, because she/he influences you and wants them out of the picture
6- sweet talk in order to ask a favour
7- remembers only what suits him/her
8- after a while behaves as an outright bully
9- when he/she keeps nagging for a favour in a variety of ways because they know you'll give in.