You have a couple options. First, take advantage of conditions to learn a great boxing secret, hidden since the Ali clown show burst upon us. That is, move just enough (watch McGirt v. Brown) to keep him for being able to set himself and direct his energy. Turn circles; side to side is an asinine concept. Second, learn to feint and let him come to you to your benefit. Every boxer has patterns of style and you'll hit him harder if you walk him into a shot as opposed to trying to "keep him off." Last, take it easy and don't let a storm of punches bother you. Concentrate on avoiding them and you'll soon see that at least half have nil to do with you At that point you'll begin to be able to start punching back with effect. Turn your left shoulder into him, drop your left arm across your body, keep your right glove up and your chin down, get the feel of his tempo and turn so his punches wrap around you. Watch James Toney. Let him punch make him miss pick your spots and land deliberate punches. Oh, and if he's wearing headgear, hit the belly.