Hi OP
9 years is nothing when one is a lot older.
The difference between me and my other half is a fraction under 5 years.
But look it like this. I was 19 and OH was 24 and people noted the difference.
Looking back I was a lot less mature but mature enough to do the right things.
Thinking about it if I'd met my OH when I was a weeny 15 and at schook and other hald would have been 20 and working,
it would not have been right even if the agre of consent was lower. However, if i had been 25 and my OH 30,
not one would have lifted and eye lid.
IMHO you are asking as you full well know that it may not be acceptable to most adults and they
would discourage you
I strongly suggest to speak, discuss and be open and honest to your parents/guradians/teachers/sensible adults
and see what they have to say.
Finally, FYI when I was 21 I thought I knew everything, then the same again at 25 and then a few years after that - looking back, I regret doing many thing at 16/18/20/21/24/etc etc. When one is a lot younger like you it is easy to fall in so-called love with the first person that talks nicely to you, older than you and in your eyes a real guy. Boys look for older women and girls look up to older men. When I was 23, if I'd met a 16 year old at shcool, trust me, I'd steer clear of them.
Go and tell your parents/teachers/family/etc ie another sensible adult and trust me, they will be with me.
HTH