Girls at that age may not be as mature as they seem. In terms of being frowned upon in society and the girl's family. OP, if you're not going to contribute anymore pics stop bumping this. My Dad is 10 years older than my Mum. Just be yourself, and enjoy each other. Not only that, you can't even go out to dinner and order a bottle of wine, go to a bar etc. Apply campsite rule and proceed.
Three women in my family have married men at least 10 years older than they are.
Is 18 dating a 24 year old too old? What about 18 and 26?
Date whoever you want, but with no expectations. She is barely an adult and she doesn't know what she want. Mid to late 20s is too old for someone to seriously consider an 18 year old. Well I'm 21 in college and I wouldn't touch an 18 year old in high school. I would get married and have kids young. The more descriptive, the better advice the community can give you. Don't over think the details.