I finished my part time job..But...

Now I finished my part-time job. I am very tired, but I can not sleep early because I keep wake up long time. It changed date my working there, tomorrow... now 3 a.m. .. today I don't have part-time job I'm very happy!!! However next Sunday I have to work with my part-time job's boss. I don't feel like work with my boss because he don't like me I think....I realized his befavor. Help me ... Should I do the relationship with my boss... I'm very sad.