“Many people think that if they were only in some other place, or had some other job, they would be happy. Well, that is doubtful. So get as much happiness out of what you are doing as you can and don't put off being happy until some future date.”
Sometimes - a change is called for. But don't delude yourself into thinking that a change will solve all your problems. When you find a husband it will solve your problem of being single but will create a new one that you are married to a slob. When you change jobs you will earn more money but have a more annoying boss. When you move apartments your faucet won't leak but your electricity will be problematic.
Nothing is perfect. So make the best of EVERY SITUATION.
Or in Jewish .... TOMID BI'SIMCHA!!!!
Rebbe Shimon in the cave - OHHHHHHH did he make the most of his time.