While I appreciate that this is a serious question concerning an issue that is rightly important to you, we older types often wish we had not taken everything and everyone (including ourselves) QUITE so very seriously during our short teenage years, so be cool, use humour and your natural warmth (we all have it, but some are frightened to show it). These years are a period of emotional change and discovery – so much changes! We can’t avoid changing, but we CAN make decisions about which direction we wish to go in. The important things are to develop self respect and emotional self sufficiency (i.e. not relying too much on someone else for our happiness) and to work on our values and qualities such as integrity and respect for ourselves and others: absolutely everyone has things about them you don’t know about. Also ensure that you have no unnecessary fear (False Evidence Appearing Real!). We CAN decide and plan about our directions by practising in our minds the kind of person we wish and intend to be. Especially first and last thing in the day when the subconscious is most accepting of your conscious thoughts. (So avoid negative t.v., video games, etc., especially at night).
Life is full of ups and downs, isn't it. The trick is to take charge of your emotions, and not to allow yourself to get too high or too low. Some people find this easier than others.
People tend to respect those who walk tall, whatever their height, so always ensure you have a straight back, whether sitting, standing or walking. This also helps our self esteem.
Life tends to go in seven year cycles: infancy till seven, childhood to fourteen and adulthood around 21. Naturally people vary, and the stages merge into each other like the seasons do, but it continues to an extent: many women are not too mature until late 20s and a lot of men don’t even start to grow up until their mid thirties (I was one!). Actually Judge Judy said recently their forties!
All parents have been teenagers of course, and can be taken back to their teenage feelings with genuine interest and positivity on your part. That said, no one person can ever completely understand another (except identical twins, perhaps): we all come from slightly different places and have different experiences of and takes on life. Hence nobody can judge us with any accuracy.
Remember: adolescents’ emotions are in a state of flux and constantly changing – some more than others, obviously.
Doing things for others without asking for anything in return, such as voluntary work is very often a key here (what goes around DOES come around eventually).
Buy yourself an Anthony Robbins audio or book; catch him on Youtube.