My(F18) father died and my best friend doesn't care

My father was diagnosed with lung cancer 11 months ago. This was a very hard time, my father and I were close and it was just horrible to see him this sick.
My best friend and I are friends since we were both 4 years old. I thought real, lifelong friends.
My best friend was on a trip in New-Zealand for most of the time when my father was ill. She did not have much internet access so we did not speak much. I informed her about my dad often but since there were some internet problems we didn't talk much.
My father died 1.5 months ago. My best friend was back in the country for a month when it happend.
Her reaction when I told about the passing; omgg i am so sorry are you ok? I said; well, not too well but what can i do.. I was obviously very sad. She then started talking about a fight she had with a friend of her.
I was quite shocked but just talked along with her.
My father had a small funeral, only the closest family members were allowed. After the convo where I told my friend that he passed; she never asked about him again.
This is 1.5 month ago. Not once did she ask about the funeral, how I feel, nothing. I am so baffled and sad. I always have her back when she had troubles. Now I feel like she does not care at all. What can I do? She is basically my only friend..i have social issues that's why.
*TL;DR my father died and my best friend doesn't seem to care. It hurts. *
UPDATE; **Wow. I am so overwhelmed by all the sweet comments. Thank you so much, it really makes me feel a lil better in these difficult times. I will politely discuss my feelings with my friend and then see how she reacts.

Thank you Dating.mobi

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