Our situation is pretty complicated, I'll try to keep it as short and basic as possible.

So I (M26) am in an open relationship with my partner "A" (M42) and everything is going great between us. We just recently moved in together.

A has another partner, "B" (M27) that he has been with for over two years before he met me. So I am the newer partner in this dynamic. A was very open and honest with both of us about the situation, we are all cool with it. The problem is, his relationship with B is long-distance. Very long distance. They meet in person maybe once every two years, the rest of the relationship is online/phonecalls. B eventually wants to move to our country, but currently can't for a few reasons.

A started a groupchat for us three and I've gotten to know B better and he is an amazingly sweet person, always kind, happy and positive, and we became great friends.

So here's my actual problem. Ever since moving in with A, I feel more and more guilty. Naturally, with me being right here I get attention, affection, intimacy and experiences that B can't have, beeing thousands of miles away. That's just the way it is and there's nothing we can really do, no one is the villain here, but I can't shake those feelings.

Both relationships are equally important to A and he spends a lot of time talking to B and they have designated one on one time and virtual dates. A tries his best to keep it as equal as possible in this situation.

B is happy for us. He never once expressed jealousy. He asks for pictures, updates, stories and we include him as much as we can. But every time I send him a picture of A and me doing something fun, or just hanging out, I feel a pang of guilt and sadness. Like I'm stealing something from B. Or rubbing it in his face. Especially when he always responds with "I wish I was there with you guys", it breaks my heart for him.

I haven't found the words or courage to discuss it properly with either of them yet. B claims to be fine and happy, and I don't want to impose on their relationship too much. If anything was wrong, it would be for A and B to handle. I don't want to make it even more about me by starting drama.

Anyone else in a similar situation? How do I deal with these feelings? Should I talk to them about it, or stay out of it?