Dictionary.com's first three definitions for friend are:
1. a person attached to another by feelings of affection or personal regard.
2. a person who gives assistance; patron; supporter
3. a person who is on good terms with another; a person who is not hostile
"Friend" is a word that is often used very lightly. Because of Facebook, a friend is someone whose face you may or may not know and whose posts you do not necessarily look at. Little children excitedly tell their parents about their new friend whom they just met on the playground and whose name they do not know.
I suppose the basic idea is that a friend is someone you enjoy spending time with; the third definition, "a person who is not hostile", fits here. However, I prefer a combination of the first two definitions. A friend is someone who I am "attached to by feelings of affection", and also someone who "gives assistance".
Some synonyms for friend that I like are alter ego, ally, and mate. An alter ego is usually a term found in comic books. The definition, "a second self", describes how everyone wants to feel about a close friend. An ally is someone who supports you in a cause, and describes someone you can trust to help you fight your battles. A mate is one of a pair; you can't have one without the other.
All of these names for friend describe how I feel about my dearest and closest friend, M____. We have been friends for almost 4 years now. Before her, all of my friends had abandoned me in some way or another before 2 years had gone by. Because of that, I am very clingy when it comes to my friends, and I often worry about what they think of me, wondering when they will finally decide that I am no longer worth their time. My M____, however, has shown throughout these years that I have no reason to worry when it comes to her.
She does not see it, but she has been a light in my life, and I will always be grateful for that. She pushes me when I need to be pushed, and she is there when I need her the most, even though we are parted by hundreds of miles. She has a beautiful heart and a bright spirit. I only wish that I could take away the pain and the worries and any other burdens that weigh her down.
My sweet Lord, you have manifested yourself quite clearly in this girl, M____, whom I call my closest friend. I pray that you will show yourself clearly to her as the infinite ocean of love that you have been described as. M____ has been a blessing to me with her guidance and has helped me around so many obstacles. Please bless her in return by guiding her and by clearing all obstacles from her path. I offer you thanks and praise for gifting me with such a dear friend.