Oh No, not little Jack! I'm so sorry to hear about this
Some people do not view chickens as pets, so it's hard for them to understand how you feel about them.
I don't share much about my chickens to non-chicken keepers (my family)-these birds don't interest them, so they don't really realize that we can get attached to certain ones. Chickens are fairly easy to get, so they think you can replace them and all is well.
Give yourself a little time, then decide if you want another rooster. When you are ready, check your local chicken facebook groups, you may have a breeder close by-do some asking around at your feed store and look at craigslist.
I was heartbroken when I lost mine last year, it was already into fall-I did want another one and considered getting one off craigslist/local, but decided I would wait. I hatched eggs this spring and to my surprise ended up with only one cockerel out of the bunch-so....I suppose for the moment, he's the fella for me