Yes they can.
A good example was of someone who I had considered a close friend who 8 years. When we first started hanging out in 2006, she was very needy and lonely. She was always complaining about connecting with others and making friends. I felt that I did the best I could to reach out. I also wanted her to find someone and get married which she did. It was when she finally got the opportunity that she seemed to change.
In fact I had spoken to another friend about the situation at a birthday gathering yesterday. He said that he was very shocked that she would dump me and yet whine about not having any friends. At the same time he said she had definitely changed and that everything seemed to be all about her after getting married. He also felt that she never appeared to be excited to come to my events but only came due to an obligation.
Hearing that yesterday really opened up my eyes in making wonder if she was just using me to fill up a void until she got what she wanted out of life.
Then again I did a chance to think about that friendship and even before she got married, I just do not feel that she was that nice to me. In fact, she was bully.