How can I handle this in a mature manner?

[Shannon]

I'm angry and upset at my boyfriend because he forgot about our plans for tonight. I feel I set myself up for disappointment because this is not the first time this happened. We had made plans to go out in his hometown so I texted him to let him know that I'm on my way and he said he forgot along with other things that he said. I have not replied to any other of his texts or his phone calls because I want to think before I act and not respond in a hostile manner.