My son asked me to postpone my wedding

I’m really struggling and could use outside perspective.


I’m a widow. My husband passed away two years ago and it completely shattered me and my son (15). For a long time it was just the two of us holding each other together.

About six months ago, I started dating my fiancé. He’s also my boss, and we’ve known each other for 20 years. He was someone I already trusted deeply, and over time it turned into love. He has three teenagers of his own (50/50 custody), and thankfully they like me and have been very positive about our relationship.
There is a big class difference , he’s wealthy, I’m from a working-class background , and in the last six months my social life has changed a lot. Events, galas, dinners, traveling with him and his kids. It’s been exciting but also a huge shift.
Two weeks ago, we told his kids we’re getting married next April. They were excited and gave us their blessing. A few days later, we took my son out to a nice restaurant and asked for his blessing too. He said yes, and I thought everything was okay.Then yesterday, my son finally opened up and said he feels like I’m changing and not giving him the same time anymore. He said the marriage feels too soon and he’s not ready for it.
After talking more, I realized what triggered him. On the 22nd, my fiancé and I went to a gala with his kids. My son stayed at my mom’s place. We genuinely didn’t mean to exclude him , we thought it would help with family blending. But he felt hurt, especially because I had gone gown shopping with my step-daughter beforehand. To him, it felt like I was forming a new family without him.
The painful part is that I had already planned a separate New Year trip just for me, my fiancé, and my son , our own bonding trip. But by the time I explained that, the damage was already done.Now my son has clearly told me he doesn’t want the wedding this soon and wants more time. On the other hand, my fiancé and his kids are extremely excited. We’ve already started planning, and my fiancé wants a big wedding.
I’m excited too but my son is my priority. I can’t move forward without his emotional readiness, and I don’t want him to feel replaced or left behind.I don’t know what the right thing to do is. Do I postpone the wedding How do I communicate this to my fiancé without hurting him or his kids? How do I support my son without completely freezing my own life?