To Mohamed Taqi:

It's okay to say 是很, or just 很. The 是 emphasis the adjective, or to boost someone else's comment.  For example, if someone says "他很高", you can add "他是很高" or even "他真是很高".

To Kendra:

I really think there is one key nuance in the final paragraph that could be written differently:

 但是， 有时候 “再见” 是很难的

Could be

 但是， 有时候 “再见” 是很难得

Phonetically it's the same, but very different meaning.  Not to say you manually typed wrong, but just a possibility:

难得 generally means rare, but with a positive connotation, and in this context I would translate as "precious" or "special." 

I would then translate the final paragraph:

As I was going home, I thought to myself, we say "to meet again" all the time, but sometimes "to meet again" is a precious thing.  Who knows when 江苹 and I will "meet again".

I feel that even in Chinese, if you meant convey the idea it's very difficult or sad to say "goodbye" (or "to meet again"), you would explicitly add "说" or "讲" or some speech verb.

Anyways, excellent and very useful website.  As an ABC (fluent spoken, colloqial Taiwanese but lived in mainland now for 6 years, so picked up quite a bit of mainland idioms - BUT beginner literacy) I find this website very useful!