Do I have the right to be upset with my boyfriend or am I being too crazy?

My boyfriend and I agreed to see each other today the last time he saw me. I texted him about something I thought would be fun for us to do that day. He was active on Instagram and Snapchat all day. However, he didn't text me until midnight today and said that he wasn't able to make it because his grandma came to town. He never told me about this. I am a little upset because I wanted to see him and we planned to see each other for a week. Am I right to be upset or am I being crazy?

Do I have the right to be upset with my boyfriend or am I being too crazy?
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