Am I really depressed or too young

So i am between the ages of 13-15 and from the past 2 months it's been so bad like at nights I just feel sad,empty or whatever I can't describe it I really just want to hit,bite or scratch myself and I do I just anger people with just my presence can't stand the fact that nobody knows me truly they think I am an happy golden retriever type of person I am not inside I remember they from I was 6 stopped playing anything with me I have to beg them to do just about anything with me and also I used to get opinions on my things when I shared about my feelings or school or all I just stopped sharing it with them like 2 years ago I at days just do things to get going I don't feel like doing anything but I still do it I just delay them I cry thinking about how it used to be at least a little better when I was younger (I am still young right?) I also want to be comforted but never open up I can't stop thinking at nights sleep has gotten worse I feel like I am ugly even though other people say I am not so I feel so ugly I wanted to die I fantasize about suicide I also want to make things worse maybe for it to be valid and I constantly seek validation about literally anything I got a report card they say it is good I think what if they are lying for me I ask them 10 times more again good i really don't know if what I am feeling is bad I have taken several test online for it but what can they do they are inaccurate most times I heard they say i am moderate to severely depressed I feel better at morning distracted i try to nit think about it but at nights Nothing to do just think and it Is just sadder I also have always felt sadder at winters and this all started from winter too.

Please say am I really depressed or I am overacting or it is just hormones.