Opportunity to find better job

I had a work for almost four years.I was doing all of duties and responsibilities when I bored in a long duration of service.In the beginning,I enjoy working because of the salary I receive at 15th and 30th of the month.So,I fell envy to my friends who are deserving in a higher position.I'm being exhausted while my former classmate has a team leader of his company.We were studied in the university then we're also the same knowledge about our lecture.Few years later,he is the top of the mountain but me is the bottom.By the time I still blame neglectedly,I shall have recalled my miserable mistakes of my life.