Can I reach my idea height, or have I stopped growing?

I turned 18 last month and I am 6'3 and 183lbs. I know it is a healthy height although my ideal height is 6'6 up to 6'8. I was wondering if this is possible as I am 18 now. I have facial hair on my chin but not on my cheeks, also I do not shave regulary but I trim my facial hair once every 4 months. So I was wondering if I can reach my ideal height or if I have stopped growing. If there is a possibilty in reaching it, what do I have to eat and do.
Thanks for your help.

Your max height depends as much on your genes as anything else. I'd ask your doctor about ways to figure out if you can get taller, as they might have some specific nutrition recommendations, etc. I know guys can grow until they are in their early twenties, so it's possible you will get taller.