I have Googled 'to blush up to one's ears', but couldn't find its meaning. Here is the context:

'Darlin, how I wished you were ten years older!'

 

'I will be," Bob said matter-of-fact, even though he had blushed up to his ears. "In ten years."

What does this expression mean here?

I have Googled 'to blush up to one's ears', but couldn't find its meaning. Here is the context:

'Darlin, how I wished you were ten years older!'

'I will be," Bob said matter-of-fact, even though he had blushed up to his ears. "In ten years."

What does this expression mean here?

I have been googling it but couldn't find its meaning. Here are the sentences:

"Darlin, how I wished you were ten years older!"

"I will be," Bob said matter-of-fact, even though he had blushed up to his ears. "In ten years."

What does this phrase mean here?

I have Googled 'to blush up to one's ears', but couldn't find its meaning. Here is the context:

'Darlin, how I wished you were ten years older!'

'I will be," Bob said matter-of-fact, even though he had blushed up to his ears. "In ten years."

What does this expression mean here?

I have been googling it but couldn't find its meaning. Here's the sentences  :

'Darlin', how I wished you were ten years older!' 'I will be,' Bob said matter-of-fact, even though he had blushed up to his ears. 'In ten years.' What does this phrase mean here?

I have been googling it but couldn't find its meaning. Here are the sentences:

"Darlin, how I wished you were ten years older!"

"I will be," Bob said matter-of-fact, even though he had blushed up to his ears. "In ten years."

What does this phrase mean here?