Sometimes I used to think that way too, and one day I started thinking about other people's problems. I started thinking about those kids who don't have enough food for a single meal, who don't have a home, who don't have parents, who can't go to school, who can't play sports, kids who have not been able to know about Jesus etc. Right then I knew how thankful I should be for everything that I have and not to worry about the problems which I currently have. Because their problems are far greater than mine. I don't know what problems you have/had but yours is not the worst, don't think that way, thank God for everything He has given you and give your burdens to Him.