How to stand my ground when I'm mad at my boyfriend?

Anonymous
He is always late. Sometimes for 30m, sometimes for over 4hrs. Sometimes he doesn't even show up.

I could understand SOME of the lateness and the stand ups, as his work is very stressful.

However, he never calls, doesn't text, doesn't answer his phone.

I try not to get mad, but I usually end up leaving him a Facebook message, ranging from "well, I hope you're ok" to "can't believe you stood me up!". He eventually answers and gives a valid excuse (fell asleep or something), apologizes and asks me to meet him.

So I usually end up being a little upset when I go meet him but then I forget it.

Sometimes I do try to discuss what happened with him, he says that he had no way to contact me or that he is so stress with work, and sometimes even gets mad when I get upset, saying that he hates seeing me sad!

What can I do to make him realize that his behavior hurts me and, more importantly, stick with it?
How to stand my ground when I'm mad at my boyfriend?
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