What happens to a Soul after suicide?

The reason of taking human birth is to unite with the Divine. We keep taking birth until we have burnt all of our karmas and experienced oneness with God. When we commit suicide we try to make a shortcut to end our troubles, but the fact is that there is no shortcut to experience peace. The source of peace and love is within us. This life is a gift to attain liberation (moksha). It is a blessing. Embrace it.