Congratulations on your engagement and upcoming wedding! What a wonderful thing. I've heard preparing for weddings can be a very stressful thing. I think that most men have a hard time understanding what it takes to put a wedding together! :) 

Take note of the different tenses that you are using, and where apostrophes go. Most of the mistakes you made were just a matter of leaving a word or two out or mixing different phrases. Some of these sentences can be said in multiple ways. The second sentence, for example, could also be written as, "Preparing for my wedding is an exhausting thing.", or "Wedding preparation is an exhausting job." Sentence structure is a difficult task! Something that quite a lot of native English speakers have difficulty mastering. Confidence is key to learning! You are doing very well. 

I am preparing for my wedding.

Wedding preparation is an exhausteding work. What makes me more exhausted is that my husband is not very helpful.

He thinks that we've already hired a wedding company to do the job, so there is nothing need to be worried about. He hadn't bought himself a suit until yesterday when I pushed him to the mall and got him a suit. Unless I tell him exactly what do to do next in detail, he will do nothing at all,. It is as if he is procrastinating, thinking that things will all be done magically, .  yYep! It will all be done by me in the end!! 

 
Is that only my husband like this? oOr do men just don't not care about weddings?

I am preparing Preparation for My Wedding 

Wedding preparation is an exhaustive work. [Or, "... is exhaustive." ] What makes me more exhausted is that my future husband [你们还不是夫妻!] is not very helpful.

He thinks that since we've had already hired a wedding planner company to do the job,_so then there is really nothing need to be worried about. He hadn't bought himself a suit until yesterday when I pushed him to the mall to get one and got him a suit. Unless I tell him exactly what do do next in detail, he will would not do nothing anything at all. , It is as though in if he procrastinating, things will all be done magically by themselves. ,yep It will all be done by Well, that magical elf is me in the end!!

Is that only my husband fiance the only person like this? Or that all men are the same? just don't care about wedding? 

Wedding Preparations

Wedding preparation is exhausting. Adding to the exhaustion, my husband is not very helpful.
He thinks that since we've already hired a wedding company to do the job, there is nothing to worry about. He didn't even pick up his suit until yesterday when I pushed him to go the mall. Unless I tell him exactly what to do next in detail, he will do nothing at all. It is as if he thinks that by procrastinating everything will be magically completed. Yep, it will all be done by me in the end!!

Is only my husband like this or do men just not care about weddings?

I am preparing for my wedding

Wedding preparation is an exhausted work. What makes me more exhausted is that my husband is not very helpful.
He thinks we've already hired a wedding company to do the job,so there is nothing need to be worried about. He hadn't bought himself a suit until yesterday I push him to the mall and got him a suit. Unless I tell him exactly what to do next in detail, he will do nothing at all, as if he procrastinating, things will all be done magically,yep It will all be done by me in the end!!

Is that only my husband like this? or men just don't care about wedding?