I'd rather be happy single than stuck in a bad marriage. Some people who are in a marriage feel lonely even though in theory, they have a partner.
Singles can be happy too, y'know! I think happiness should start with oneself and one's attitude and outlook. Only when you're able to be happy with your own company and solitude can you then bring something positive into a relationship. Don't think that once you find someone to 'latch on to', all your problems will disappear.
I'd rather enjoy life in the meantime and if that special someone enters my life, then he's more than welcome to step in and enjoy the journey of life together.
Marriage is not the be-all and end-all.