My first relationship had me at 13 and she was 18. Only 5 years, but I daresay that's a lot more significant than 10 years in older ages. I still treasure it though.
Otherwise, all my relationships have been with people 10-14 months younger than me, just by coincidence. I don't even consider age in romantic pursuit, it just turns out this way.
https://www.joincampaignzero.org/
Guide, it's Guide, it's that Guide