<human>: I'm 19 years old in my second year of college, and something's been bugging me in the last few hours. 

In my last year of high school, I had two best friends. We'll call them Mary and Natalie. In fear of burdening you all with pestersome high school drama, I'll make the details quick.

Basically, Mary had a boyfriend, boyfriend cheated, she got back with boyfriend. Natalie (and I as well) got mad, they ended up fighting, Natalie refused to speak to Mary. 

I remained friends with both of them, which was an awkward situation (we all had a class together and I was seated literally in between them and would take turns interacting with each of them). There was a lot of animosity on Natalie's part , and she was honestly downright rude to Mary.

But she was good to me and she was my best friend, so we stuck together. Until I graduated high school (she and Mary are a year younger). A gradual shift occured: less texts, deleted pictures of me, all the way until she unfollowed me on social media and never spoke to me again. 

Mary and Natalie now go to the same college I do. Today, I was looking through my old phone and found pictures of us together. I really really miss her. And I want to text her. I'm not sure if I should and how shitty I'll feel if she doesn't answer. What does one even say to someone in this situation? 

I have many friends in college now, I'm having a blast, and I'm in no way stuck on the past. I moreso want to do this to relieve my own conscience. My friend told me to not be dramatic with the text. Just say "Hi, how are you?" But I feel that is just pretending that nothing happened. I was thinking of saying something more about what happened, acknowledging that we're adults now and I'm curious as to what happened. 

Any help?

Summarize the given text in a few sentences.
<bot>: Friend stopped talking to me after fighting with our mutual friend. I kind of miss her but I don't know what to say or if I should say it.