Sometimes the best thing you can do is walk away from a bad situation. It seems from what you have written here Dagmar, you have been in a lot of different situations bad or good. Sometimes its ok for a door to close,
because it leads to better opportunities. A lot of times when people are in a comfortable situation they don't want to leave it, which is what i think the first stanza talks about. When you go knocking on the doors again, you don't want to leave your comfort zone.
Our inner voice always knows what is best for us. And it seems like yours did too as you say in the second stanza. Inside you know it was best to walk away and look forward.
And then you explain some of the pain you have been through. You leave the reader to imagine how bad it could have been.
I love the ending because you show the reader what you see, yourself and being beautiful no matter what you have been through.
I like the story feel to this poem, each stanza works well to complete the last and the happy ending was a twist the reader didn't see coming. Well done.