I agree with Lv4dogs, he needs sometime away from you. He needs to learn that you will come back. Try not to make coming or going a big deal Make going in his crate a wonderful experince, like Lv4dogs suggested stuff his Kong with really yummy treats, treats so good he won't even care that you are gone, experinent you will find that magic food. Keep at the crate thing, some dogs take longer than others to learn to like them. Maybe you can try feeding him in the crate so he also assoicates it with good things.
When my puppy was younger she would carry on in her crate if she could see us, so I covered up the crate and the problem stopped, she is happy in the crate and goes in whenever I am away from home. I let her out within about 5 minutes of returning home, she sitting happliy in her crate until I let her out.
Also if you think it is you leaving more than the crate, then practice leaving and coming back. Leave for 5 minutes and come back, then for 10 minutes, back to 5 practice coming and going and not making a big deal about your departure or your arrival. Teach him that when you leave it's no big deal and when you come home he can be happy but he was ok while you were gone. Vary your time away and hopefully he will realize mom does come back and everything is ok.
Hang in there, you have only had him a week and you both need to adjust and get on a schedule.
YOu are doing great!