I think there may be a misunderstanding somewhere.why is he holding me like this?...i thought he wanted his space
You know, LMMB, you're right. I shouldn't even have suggested that the OP could attempt to train the dog on their own.Neutering him might help (might) with the humping, but it won't help with the severe aggression. You need a full vet check (brain scan would be good, I'm rather baffled that you can afford a brain scan, but not a behaviourist? Surely the scan would cost more?) and a qualified reputable behaviourist (I vehemently disagree with @Madra Anamchara 's suggestion that you attempt to control him alone - that is dangerous advice that could see him go for your face next time). You need someone who can see with their own eyes what's happening on the ground. If you cannot afford that then you only have one option - I know it'll break your heart - it would break mine, too, but euthanasia would be the only other option. It would be irresponsible of us to suggest anything else. You cannot manage this on your own. We can't see what's going on, like a behaviourist can.