If you would like to be in a relationship, but have not found a partner there could be a number of reasons for this:
You may like your independence and prefer your own company, so you avoid finding and starting a relationship.
You may have been hurt in the past and are subconsciously defending yourself from being hurt again in the future.
A relationship makes you more intimate with another person and this will bring up your hidden fears and insecurities. By staying single you will not have to face these.
You are emotionally sensitive, have a big heart and fall in love very deeply. This may make you afraid to venture yourself in case you lose the love one day.