I was so sad when my ex boyfriend was no longer my friend like he promised

But I have other friends thankfully although I miss the most important friend I ever had. I cannot force him to stay friends with me when he has a wife. He’s made it very clear he cut all ties with me. He told me we would always be good friends before he met his wife. I never wanted him to not have a new relationship I understand that. But even though we were in a romantic relationship at one point in time, I thought we would always at least stay good friends and be with each other in our lives. I would have been happy for him with his new love even if part of me was sad. But I guess just being a good friends who behaved herself wouldn’t be good enough huh?