Most Helpful Girl
Go for it!
I've had age differences wider than that.
If you both are into eachother don't let age be the determining factor.
You found someone you get along perfectly fine with.
Continue to let things flow towards that direction.
Its not every day that you find that.
I only see the age gap as a potential problem, if she's mentally immature and wants to do the whole "party me, phase".
If she isn't that type... I'd say things look safe as of now.
Most Helpful Guy
I don't think it's a big deal and as she gets older it will be less of a big deal to other people looking at it , as long as she seems mature for her age