Of course we are not the only life form. Any human that believes otherwise is surpassingly ignorant to believe otherwise.
I understand most of the population on this planet work a 'normal' job and live a day-to-day 'normal' life - therefore no time to research and compile data; and if you have researched and still believe that there is no life on other planets, galaxies and cosmos, you haven't been researching correctly and/or you just haven't fine-tuned your pattern analysis skills yet.