Commit yourself to a higher purpose. Pursue something that is meaningful to you, which can especially be a creative art - writing, sketching, painting, playing an instrument or anything else. Once you have chosen, aim to improvise at it everyday. Once you see yourself making progress, you will gain confidence and that will suffice to give you happiness, despite the lack of romantic love in your life. In addition, you can also befriend people who pursue the same art as you do. Interacting with such people will help you learn and get better at your art.