Composition

Hello!^^

Thank you for sending your homework.

Cheers!
Jean

1. willpower 
2. get-go 
3. mind over matter 
4. flat out 
5. demonstrative about feelings

I should have strong willpower in order to succeed.

>> Should I want to reach my target, I would have to possess steadfast and indomitable willpower.

 I wanted to have a new girlfriend feom the get-go.

>> I wanted to have a new girlfriend from the get-go.

>> or: It seems that I must have hoped subconsciously to have a new girlfriend from the get-go.

 Whether I flirt with a new pretty girl or not is mind over matter.
>>  Whether I flirt with a new pretty girl or not is a simple case of mind over matter.

The word that I love her was a flat-out lie.
>> My declaration of love was a flat-out lie. 

 If I talk about the matter about my girlfriend, it would be too demonstrative about feelings.

>> If I talked about my girlfriend, it would show that I\'m too demonstrative about my feelings.