hundreds of threads about this mate.... please search!
you need to motivate yourself, have certain goals that you want to accomplish and aim towards that wether its being a bottom feeder club and get them promoted, then to middle table club, win the league with them then to the big boys and win the ECL etc etc .....
or have a personal aim that you want to be the best manager in history (or your nation) win titles at the same club or all over the world etc... think of something that you want to accomplish every time you start a new game otherwise it does get a bit boring etc!
motivate yourself, we cant motivate you!