We all enter into each incarnation with various patterns derived from our thoughts, words, and actions in previous life. An addiction very often develops from habits cultivated over several lives -- many addictions, for example, are attempts to run away from life, or from one's problems. To resolve them, it's necessary to grapple with the habits of thought and feeling that give them power; that can be difficult, of course, but then life is that way.

Suicide can have many sources, but it often comes from a similar attempt to run away from life or from the problems of life. It's a waste of time, because you'll just be reborn into another life where you have to face the same problems over again. If you confront your problems instead of running from them, you can get past them -- in your next life, if not in this one.