What do you've got to lose? Write her a mail or a handwritten letter. Life is short, and at the end we'll regret all the things we didn't do, not the things we did.
I'm still friends with one person I met the first day of kindergarten, they still live local to me but we don't see each other face to face often. Most of my other school friends were shared by my ex and either quit talking to me after we broke it off or were spying on me for her and doing it in the stupidest ways possible. Oh well I like having a small friend group, then I can focus my energy on being a great friend.
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God, I miss talking to her. We’re just so distant now...