I (28M) broke up with my partner (26F) a few years ago, I’m very close with her parents, but recently learned she is now getting married and she’s asked can I not contact them anymore?

Me and my ex partner dated a few years back and while we never worked out, largely due to just wanting different things, we split amicably and do talk sometimes but we aren't friends. While we were dating her parents became very close to me. Over the years I've constantly been around for them, helped them move, often go for drinks or auctions with my exes dad and sometimes dinner with her mum, as I drive I was often the person that took my exes mum and dad to hospital appointments while he was off work from a severe spinal injury, even stayed over to help cook and clean during that time, as my ex was studying in Malaysia at the time and could not make it back home due to covid travel restrictions (UK based, and it was very difficult at the time). They essentially treat me like family and I treat them the same. We have a lot of similiar hobbies (cycling and triathlons specifically, I compete but they tend to just support it and join in when I train as they are/were both huge on cycling) When I vanish for a few days off apps or anything else they usually call or knock my apartment and check up to see if I'm okay, they genuinely do care for me and I do the same back, as I didn't grow up with much of a caring family life it's something that means a great deal to me. They even had a second Christmas dinner on boxing day recently just so they could invite me seperate to my ex, as we don't get along very well and it is often awkward as you'd imagine.

It's something to me that has become seperate of my ex partner and I've moved on from her and she has from me, we're both happier apart, I've had other partners since with my exes parents even asking and showing support and giving me advice regarding it. I understand how it can sound one sided when I bring up my family life as well as only hearing my side of this, but they've genuinely become like family to me.

Recently my ex partner came to visit me to tell me she's getting married and if I'd stop contact with her parents as she doesn't want it to be awkward with her new partner, as her parents don't seem to take much interest in him as they do/did with me, as much as I'd wish the best for her it's truly left me heartbroken that she wanted me to cut off contact with people that I love as family and I feel loved by. I explained it isn't as easy as just cutting them out of my life which just caused an argument and she left.

I'm really lost on what to do here and feel the situation is being placed on me entirely, if someone has advice I'd genuinely appreciate it.