It is very reasonable!!!!!!! And believe me, I’ve dated guys, 7-9 years older than me, my grandmother met my grandfather when she was 17 and he was 53, so no judgment whatsoever. Woman to woman, the hardest thing I’ve had to overcome to make my relationships successful is thinking that my feelings are not the most important thing in the relationship. His are just as important, and I think realizing you’re upset will help with the issue.