I kept my ex husband’s last name because of our children.

When my kids were 2 and 4, their father and I got divorced. He wanted nothing to do with them at the time and I knew I would be in my own with my kids. Because of this, I chose to keep THEIR last name to feel united as a family and for purposes of doctors, school, etc. It’s been 8 years since the divorce. He rarely sees the kids besides FaceTime. We have no relationship. However, my boyfriend has brought up repeatedly how he hates my last name. He won’t say it and if he hears me say it or read it aloud to someone, he becomes enraged. He thinks I’ve kept it to stay close to my ex. This couldn’t be further from the truth. I’ve kept the name for my kids. If I get married and/or when they’re older, I’ll be happy to change it. But being forced to change it because my boyfriend doesn’t like it feels wrong. AITAH??