Why do you feel as if it is impossible?
Dealing with depression and suicidal thoughts is a struggle. If you let it get to you, it will make you do the deed. You have the control over your emotions and actions. I wrote an essay on how to be happy and how to remain in that state of mind no matter the situations around you. Let me know if you would like to read it. It obviously wont solve your situation but you can attempt to change your mental process which is what i focus on. By doing that, it can become easier for you to work on overcoming these bad thoughts.