I'll start with the context: she kissed a friend of her before opening up the relationship and I was quite frankly mad about it because I've always said to her "I'm cool with you kissing or have sex with anyone as long as I can do the same" and she always refused the idea, then did it anyways. After that we both agreed to open up our relationship, she went back to only kissing the same person and I had sex twice with a friend of mine. After that she said that she felt too uncomfortable to keep having a open relationship but this made me thinking that she only wanted this other person she kissed twice without consequences, not a real open relationship. Also now I feel quite uncomfortable when she sees this person in group with other friends, but I don't want to become a jealous boyfriend that limits her freedom due to my anxiety. I don't know what to do, I just wouldn't like to end this relationship due to this issues