It is fine- as long as nothing illegal is going on, everything is consensual and both people are happy together.
As a 16-17 year old, the oldest guys I dated were in their 50s and 60s.
If you were 38 and he was 48 nobody would give a toss. But because you are a teenager still people lose their **** .
At your age you can smoke , drink , join the army and fight in wars . If you want to date a guy 10 years olds than you crack on .
How did you two meet can I ask? was it just a friendship that turned into something else ? I mean my friend was 17/18 when she started dating a much older guy however they are happy together with a kid now so it varies