Young lady. you are young, and I am not discriminating your age because there are kids who are geniuses at a younger age than yours. But I'm very sure you lack understanding of who God really is. God is the all powerful creator of the universe, whom science tries take out of the picture by saying that all creation came out of nowhere and that all things seen happened through billion of billions of accidents. A wristwatch has a design, and not just a design but also need certain knowledge to be built. What has a more complex design, a watch or the universe? God designed the universe. The bible, which is the faultless word of God shows within it's content that God knows the past, present and future through prophecy. God showed the whole world that He loves us by sending His only begotten son to die for all humanity. The existence, crucification, and raising from the dead of Jesus Christ cannot be argued. They happened and there are many sources that say so, including those of non Christians. Another very trustworthy (and i think the most important one) is that in the year 64 A.D. there was an emperor called Nero who tortured and killed Christians. Jesus died at about 33 A.D. so these Christians were the ones who saw Him and who were preached to by His disciples. Everything I just said can't be argued, many have tried to get rid of the bible through science and through saying that it is full or errors, but scholars have said it is 99% accurate in its translation and that the 1% or errors it has doesn't really change the overall meaning of the bible because they are minor errors in spelling and such. The God we worship is Holy, He is alive, He is king of kings and Lord of lords, He knows us better than we know ourselves and loves us more than anyone could ever love us or understand how much He really loves us. There is nothing that can be hidden from Him, no thought of your head, no feeling of your heart can be hidden.
Now about your depression, if it is based on the fact that you are lacking the attention from a person or a possession remember that nothing and no one is perfect and that sooner or later things and people will leave us unsatisfied. If someone is doing wrong to you remember again that no one is perfect and that in this world there are people who enjoy hurting others, but remember that God will judge the whole world so that any evil that is done against anyone will not go unnoticed. Our duty is to forgive those who sin against us and love God with all of our hearts, minds, bodies, and souls.