What are symptoms of depression?

I want to know whats wrong with me. I have less problems than some other people and everytime I fall back into feeling bad and worthless. I will give more infos if needed, just dom't know what information you need
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D1:I have the feeling of being unloved all time, I can only cover it if people give me the feel but only for short time. I am sleepy all time but I don't know if that counts, with alcohol I am not asleep.I sleep well but sometimes I wake up at midnig
What are symptoms of depression?
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