Honey, don't sweat it. Go to the gym and lift something heavy, post a dope selfie, and be a sass with class.
You have every right in the world to be confident. You deserve to love yourself. So show yourself some love: do naked yoga then take a lavender-scented bubble bath. Dance like no one is watching. Learn to laugh at yourself instead of being embarrassed. And most of all, learn that you don't owe anyone anything, and you definitely don't have anything to prove.
He's with someone else: Good for him. Remember that things begin and end for a reason, and someone can never make you jealous over something you have already had. You do your thing, boo. You're better off doing you anyway!
If someone is mean to you or talks ugly about you behind your back, learn to let it slide and simply mark another friend off the list that keeps getting shorter and shorter. You don't need those people in your life.
Never feel inadequate, for you have a soul that can move mountains and a fire in your eyes. Someone else's beauty does not take away from yours.
Do not allow bitterness to creep into your heart. It's a nasty disease that can easily ruin you. Find it in you to be happy for people, even if they could never return the favor.
Learn when to fight and when to let go. Unplug from social media and actually be alone with yourself. Do you like the person you have become? If even you don't enjoy your own company, then don't expect anyone else to.
Most importantly, take time out of your day for YOU. Whether that be through the gym, getting your nails done, or reading a book, do something that makes you feel good. Try meditating. If meditation is not your thing, sit in silence for at least five minutes. Listen to the sounds around you and develop a sense of awareness. Through that, you can learn to love yourself a little more.