How to interpret the degree of "wrongness"?

..well, if you have known that the person is wrong for you in the first, you should have not said yes to his invitation.. Anyhow, if you have already said yes, then its fine.. Sometimes, our instincts are also wrong.. just try to befriend that person and find out his attitude.. If you found out that your instinct is right, then that's the time that you try to keep distance from that person.. I would just however request that if you befriend that person, don't attach yourself too much and don't pretend.. If you really can't befriend him, then after that date of yours, try to keep distance immediately..