I would check who it through the door viewer and surveillance footage what is the vehicle they got out of if it is not someone I know or seems fishy.
Then get a pepper spray or taser and ask through the door who it is and what do they want.
That door isn't opening until I know who they are thoroughly.
Communicate. Make effort. Be what they need to heal or be heard. Sometimes you can help each other grow the best when you listen to their needs as well as yours. Equity is more equal then having equal response to all situations.
Respecting boundaries. Keeping commitments. If we agreed upon something, I hold them and myself in the same light to commit to it.
Don't blame anyone, everyone has priorities. Especially for what which is outside of their control, be kind to your own self on the same.
Prioritize individuals who make you a priority. Sometimes I may not know what they are dealing with, yes it's not my job to be responsible for them. But I choose to be kind and not judge.
We all make mistakes. Learn to forgive. Yourself and others, which doesn't mean continue to be in that relation. If that is what is health for both of you, or if more involved.
You can go to sleep angry... though it's better to make sincere efforts later to remedy the issue, and work on your relation.
Ah. The 5 Love Languages! It's a great book that talks about how we show love to others and how we expect others to show love to us.
My love language is Acts of Service. If I offer to cut your grass for free (for example), it may be because it needs it but more than likely it is just my way of saying I Love You! Cooking, cleaning,, changing your tire, ironing a friend's shirt (yes, I have done that for a man friend) - it is just my way of expressing Love cuz I'm not one to say it often.
And after reading the book I realized that others do not express love like I do, which really helped me understand people and relationships.
For me it is this sweet old lady at the social security administration office. She's soooooo sweet, possibly delusional, very optimistic, and told the lady behind the glass she loves her three times I think she has said "fantastic" atleast ten times lol