No need to wait for him to change. You can use visualization to make things better. Visualize him behaving in exactly the way you want him to behave towards you, saying the things you want him to say, etc. There is a book by Shakti Gawain (Creative Visualization) that describes how you can simply imagine yourself getting on really well with the person. Just get into a meditative state and picture it like it is really happening to you now, and that he is right in front of you, being very nice to you, complimenting you, being kind, etc. Visualize this twice daily and then let go worrying about the topic for the rest of the time.
There is another book by Lanie Stevens (Pussy Whip) where you can imagine calling a person to you and having them come over and say exactly what words you want them to say. This could be someone you are in love with or any other person who you want to get to behave differently towards you, such as your boss at work, etc. It works with anyone.