Being gay has made me suicidal

So, I'm 17 and from London and I've known I've been gay as long as I can remember. I've always been a negative person but as soon as I hit puberty and the want to come out invaded by head, I've hated myself and who I am. Because of this, my parents noticed I was acting strangely and got me counselling, hypnotherapy and took me to the doctors, but to this date the only thing that it has helped with is my anxiety but I feel my depression has increased but I've got better at hiding it. I don't see the point anymore. So any tips for dealing with depression/coming out would be appreciated