How do I prepare myself to lose my friend (a dog)?

I was in my freshman year in HS when my red nose, light brown Pittie (a gift my aunt gave me) was a puppy; a sweet girl we named Cindy. She's now exactly 14 years old and obviously made it this long.

She'll be gone soon and I'm not really prepared to let her go yet. I haven't thought about her death all this time till recently. She's old, getting weaker and slower in walking. I'm sad that her death is coming. How do prepare myself to lose her?

How do I prepare myself to lose my friend (a dog)?
Post Opinion