I swear this is not for relationship advice. I want to know if my actions are valid. 

TLDR: I feel like my boyfriend strung me along all day. I canceled plans and now i feel awful. Was this a BPD related response? Advice for how to not feel so disgusted with myself?

Situation: 
In a relationship. He’s kept messaging me but didn’t make plans until today, for 3 weeks. I hear from him that he has no idea when she’ll come, and then I don’t hear back from him for 5 hours. 

I message and cancel the plans, I hate being strung along, etc. then, he responds and says that he doesn’t know when she gets off work but we’re waiting for that. I message back that was super hurtful because he strung me along all day and knew that it wouldn’t be until the evening

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I feel awful about canceling plans without talking to him. He hadn’t replied to me for 5 hours, so Im pretty sure he just forgot but still

I feel awful for making it about me. It’s been three weeks of odd messages and I just felt forgotten and unimportant. 

What’s advice for helping these feelings? I feel so awful like I’m crumbling.

Was this due to BPD? Or is this a valid response for anyone? I gaslight myself hardcore on symptoms and I’m afraid to leave something like this unaddressed.