My friend cancelled our plans this weekend due to depression but I’ve just seen her in town with another friend? should I cut her off?

My friend cancelled our plans this weekend due to depression but I’ve just seen her in town with another friend? should I cut her off?
She said she’s feeling low recently and feels like she doesn’t have many friends and said “can we meet up another time because my mental health is really bad” and she’s got a lot of university work to do

I wasn’t happy about it and we argued a bit but I accepted it and said I’m happy to meet up another time

BUT I was in town with my sister just now and I saw her with another friend and I said “hey” really loud and she looked at me like she’d just been caught … such a guilty look

then I sent her this message and then blocked her but do you think this was a bit too dramtic or was I right for cutting her off?
My friend cancelled our plans this weekend due to depression but I’ve just seen her in town with another friend? should I cut her off?
Post Opinion