<human>: Summarize the given text in a few sentences.

We met in grade 6 and kept in contact constantly even in high school where we went to different schools.

After high school I saw her less and less but I have always tried to keep in contact.

Fast forward to now. I haven't seen her since winter and she doesn't even call anymore. I have invited her to my house parties and she always says she will go but never does and doesn't even leave me a text saying she can't make it.

The last time that happened was last Saturday for my birthday party and I even called her last Sunday to hang out with her. I asked her again then if she was still coming and she said yes.

Side note: She is currently in a long distance relationship with her boyfriend in South Africa so I know she has issues she's dealing with.

I actually ended a friendship years ago when I wouldn't even go so much as a text from a supposed very good friend.

I get that you can get busy with school/relationships but I honestly try very hard to keep my friendships alive even when I am really busy.
<bot>: I barely see my childhood friend anymore and we hardly talk. Am I being selfish/irrational for not wanting to put up with this anymore?