Can I tell my brother I am depressed?
That's awful. How long have you been feeling depressed?
At lease a few months.
That's a good idea. Your brother is someone you can trust, you should turn to him for help. There's no shame in asking for help with your depression.
Nah. I'm going to ask him for money. Also I have mood swings sometimes and he needs to know.
Well if you need money that is also a way of asking for help. Money can help you seek help. It is good that you trust him to help you now that you need him.