Her business comes before friends. Ever since she started her mercenary career she hardly had time to sit and enjoy a good gamble anymore. If she did make a friend that friend would most likely have to convince her to stay around. Violet can be very friendly and protective to those she likes.
To be honest, the enemies would hate her more then she would hate them. Violet has many different type of enemies, gambling enemies, co-workers that get mad if she does better, clients don't tend to like her either. She is very hard to piss off since she thinks it is a waste of time to get mad. Though if she was mad she can get mean and cruel.
If someone asked her where she stands on the idea of love she would tell you "I have no idea". She never really thought of it as a human or vampire. All she could really say is as long as the guy is loyal and supportive she doesn't care who it is. The guy also needs to be able to handle her gambling needs and how she loves blood(i mean really REALLY loves blood).