Well first you need to identify what flaw in your character is making you feel the need to be with someone so desperately (especially if in teens or 20s). If you are solid and strong on your own and develop your own skills, hobbies etc and then enter a relationship, you'll be a better person for it and have more to offer. What happens if you enter a relationship and then after 6 months you are single again? You will be back to square 1, feeling **** again. So build your confidence now, be comfortable on your own and then when that someone comes along you will feel super but not wholly dependent on them for feeling great.