<human>: Throwaway because she reddits too.

Basically the title says it all. We became friends over a year ago when we joined a gym class together. We text fairly often, ask how each other's days went, talk about boys, etc. We're great pen pals I guess--but we never get to hang out. She's always tired or busy or wants to spend time with her cat.
On the rare occasions where we agree on a date, "Hey let's hang out next Friday!"--she'll text me a few hours before the time saying she can't make it.
Is she blowing me off? Should I just let it go? I understand people have busy schedules--I work overtime myself--but maybe I'm trying too hard to be her friend.

This isn't the first time this has happened to me, but I'm not clear on what the next step should be.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My "friend" blows me off whenever I want to hang out, cancels constantly on me or is too tired.