It's personal preference, but basically edge limits that increase over time, like at 15 you're looking at +-6 months, at 20 it might be + or - 1 or 2 years. At 30 you're probably at looking at 5 years either side of 30.
Once you hit 500 the attraction window is so large it becomes mostly irrelevant, and you're judging more on aristocrical lineage and/or aristocrical diet.
It's only a few more years til 1000 (which usually turns out to be a very dull party with no surprise guests) and by that point you're lucky to find anyone attractive.
There's obviously the old 'hurr durr he's over 2000 so he must be gay now' stereotype, but as far as I can tell, attraction isn't cyclical.
They are kind of stuck. They have to find companions who don't have children or responsibilities. The best majority of the people who land in those categories are younger folks.
Be really careful, I couldn't tell which one exactly from your post, but as time goes on, you're going to have to watch out either for people trying to drive a wooden stake through your heart, or chop your head off with a sword to steal your power. Just wanted to toss out a helpful FYI.
On the other side, as someone younger it's hard to date people much older, as they start casually talking about what they did during various wars, or comparing the COVID pandemic to the black plague, and I've just got zero frame of reference to connect.
Everyone much older I've met has been just delightful (I assume the rude ones eventually get murdered by their local townsfolk) but it's just so hard to make that genuine connection when your life experiences are so different, you know?