How do you stop being so clingy and needy all the time ?

Tell yourself every morning that today " you matter " and try to leave a mark on the day by doing something as simple as a smile to a stranger or you can help someone older with something too physical for them. Walk tall with your head high because you do matter.

Work on building up self confidence...find activities/hobbies that you enjoy and are satisfying

Learn how to do things independently. Self help books. Read them.

that's a good question

Get a hobby

Use teflon