My partner (28M) and I (26F), have reunited after some months apart. He came to me saying he realized I was the one he wanted, however when we finally agreed to get back together he said he wanted to be able to sleep with other people. It shocked me a little, primarily because the year prior we were monogamous as we both had agreed at the beginning of our relationship that nonmonogamy wasn't for us.

I agreed to his needs and explained to him that I personally would be monogamous still, and that as long as he would communicate and practice safely that things would be fine on my end.

Ultimately I want him to be happy. I still have a few anxieties about it, some I will have to work through on my own surely, such as trusting him to use protection and such.

Has anyone had a relationship like this last?