I can't determine your relationship with Ava without more context. Friendships are based on mutual feelings, shared experiences, and connections. If you feel a bond and enjoy spending time together, she might be considered your friend. Ultimately, it's up to you to define the relationship.
If you mean Ava Hughes from Diary of a Wimpy Kid (as Marley, Shelly's friend) and R.L. Stine's Haunting Hour, she is either 14-15 as of now (late September 2013).
Ava
Ava Telek goes by Ava Maria.
Ava Shamban goes by Dr. Ava Shamban.
In Pig Latin, Ava would be said as "Ava-yay."
Ava Sambora's birth name is Ava Elizabeth Sambora.
Ava June's birth name is Ava June Wiggins.
Ava Lange's birth name is Jessica Ava Lange.
The address of the Ava Art Guild is: Po Box 1463, Ava, MO 65608-1463
5' 4" (1.63 m)
Ava ava The city of AVA, are you working a crossword?
Who is Ava? And I would guess you would give Ava her lipstick...