いつも調子に乗って頼みすぎてしまいます。って英語でなんて言うの？

"My eyes are bigger than my stomach"- this is a fun expression or idiom used to explain when you order too much or eat too much and eat until you are too full.

It means that when you see all the food, you want to eat eat it all, even though your stomach cant fit all the food in.

Eg: I ate too much. My eyes were bigger than my stomach.
Eg: I don't know why I dished so much food. I think my eyes are bigger than my stomach.

I hope this helps :)

1. Order more than is required
2. This expression may be used whenever someone has taken/ordered too much food
3. 'Like a child in a candy shop'. This comparison is because a child is always fascinated
   by a great choice of sweets in a sweet shop and obviously, cannot buy or eat them all,
   though would probably like to try.
   Stuffed = totally full

My eyes are bigger than my belly
Belly is another word for stomach (informal, comical)
This funny idiom can be used to describe someone who orders too much food. They see what they like but their stomach cannot eat that much.

I always end up overdoing it at restaurants.
'To overdo' something is to do something too much.
In this case it would be to overeat.

I always end up ordering more than I can eat.
This is a simple expression stating that you order too much food and you are not able to eat it.

I hope that helps!

"My eyes are bigger than my stomach." is an English expression that explains you order more than you can eat because you like the look of it.

"I always order too much." means you order too much food.

a food baby - this is when you're so full that your stomach looks like it's pregnant with a "food baby."

to stuff your face - this means to shove food into your mouth; basically to eat more than you should

overeat - this means to eat more than you need

I always struggle to finish my food at a restaurant.
If you struggle to do something it means you having trouble to do something.
I have a habit of ordering something and not finishing it.
Habit is a way you always do something.
For example :"He has an annoying habit of interrupting me."

The phrase 'excess food' stated in the first statement means 'more food than one can eat'. So, you usually order 'excess food' which you never finish eating, thereby leaving what we call 'leftovers'. Some people do take the 'leftovers' home to be eaten the following day as breakfast. For some people, this is usually a planned activity.
So, you may say:
I usually order excess food at restaurants and do not finish eating it all.
or
When at a restaurant, I always order too much food and always have leftovers to take home.