Ive struggled with depression. You probably have many insecurities and doubts about yourself and I can relate to that. Understand that you can never feel secure in who are until you know who’s you are. God loves you more than anyone so rely on him. Pray and keep a bible/journal. These things have dramatically changed my life.
Also, find someone to talk about your feelings with. This person can be a parent, pastor, or a good friend. Do not go to someone who may be abusive or suffering mental diseases as well. The idea is to keep yourself connected to someone who will be there to listen and encourage you. Even though you may feel alone, you will be surprised to find out that at some point someone felt the same way you do.
Depression and anxiety will be something you may battle for the rest of your life but with God you will have the victory over it. You may say why? why God? Its the only answer I have. Ive tried everything. Therapy, countless doctors, etc nothing compares to the confidence I have in Him.
Ill be praying for you and you can email me at email@example.com. Remember that you are special. There are things that make you YOU (unique qualities and talents) and NO ONE can take that away from you! Embrace your past and the future. The time is now, start experiencing life
P.S. Psalm 23 helps me so much when I’m anxious or feeling depressed.