Some people just aren't built to have partners. Maybe they are awkward around others, maybe they try to be funny and end up offending, maybe they aren't motivated to go the extra mile to have a partner. There are lots and lots of reasons that a majority of people in the world are single. Having a partner is not guaranteed in life. Real life is not a John Hughes movie in which the person you are lusting suddenly gets the hots for you and brings you a cake on your birthday. Being in a relationship takes timing, as well as work, compromise, and sacrifice that many people aren't willing to make.
All that said, if you want someone in your life...you can a) hope that a person will randomly enter your life like a Hughes movie, or b) you can develop a social life that includes a large circle of friends to increase your odds in meeting someone. A larger social circle might help you hone social skills and empathy so that if you do meet someone you fancy, you can connect with them.
I appreciate those that hold a romantic perspective on life, it certainly looks great in movies. It has never worked out that way for me...but I deal with it by learning to enjoy my own company and not pining for that which I don't have much control...the existance of a partner.
On the other side of the coin...at least you aren't partnered with someone that hates you, belittles you, or to whom you owe a larger percentage of your paycheck. If you want to see real suffering...talk to some of the people that have toxic relationships that they have to struggle with every day. Be glad that's not in your life.
I hope I'm not a downer...but I wanted to add some contrast to the perspectives of the charming posters above me. :smile: