Being happy is hard, and for most it always has been. If you're reading this, you probably aren't living under oppressive rule that dictetes how you should live your life, bound by inane axioms. You aren't at threat from militants who might sacrifice you for their own uninformed beliefs.
You're probably just living your life in a construct you feel has limited potential to break free of. You goto work, day in, day out. You have a partner who you find yourself on rocky ground with more often than not. You may not have a partner, you just think that finding one will cherrypick you from the 'Uncategorised' list to 'Happy'. But what if it doesn't?
The little things are what get us down. The 'what if's' and constant exposure to the lives of others that on the surface look like everlasting bliss.