I feel that way sometimes, before I married my current husband I felt that way very often.
You deserve to be loved, and noticed, and given attention. Ask for that from the people you love. If they can't give that to you, keep on searching for other people who can do that for you.
In the meantime, keep reminding yourself that you deserve better. And promise yourself that you will keep doing whatever it takes until you have people in your life who really love you.

Take care of yourself, you are worth it.