It’s an absolute killer when a partner doesn’t think of you. 25 years of service to him and nothing in return, and note I say service, not companionship, marriage, love, friendship, no service. He has let you take the load for everything, and you’re not even getting a gold watch, that’s what my grandad got when retiring from 25 years as a bricklayer after working for the same firm. He clearly sees you as staff and takes you for granted, you were hoping for one nice gesture, and it’s been allocated back to you with a shrug.
In relationships we all work as a team and gradually allocate each other different jobs to do within that partnership, bills, bins, pick ups, drop off etc, but occasionally we notice the other one struggling, and without prompting, we take that task on for them, to give them respite. Occasionally we see something they might like and bring it to them, could be as simple as a chocolate bar we know they like, or we book a lovely get away for an anniversary, like your partner should have done, but no, he didn’t, why would he do your job for you, that’s what you’ve been employed to do, always and without complaining, so he can get on with his life unworried. I’m guessing when you became engaged, he saw it as the literal meaning of the word, engaged meaning ‘in use’.
Like previous posters have said, it’s also concerning that you don’t want to confront this as it will cause an argument, so guessing by arguing or sulking he has taught you to let him have his way. Maybe have a think about the future and possibly treat yourself to another 25 years or more of wonderful freedom and happiness away from this useless unloving human.