I, on the other hand, think you need a little analysis of the situation here.
First, I agree with the idea above that you need to be realistic - if moving is never an option for either of you, this is probably a waste of time. Should be discussed.
Second - the age difference is not necessarily a big deal at most stages of life, but MIGHT be a big deal for the two of you, depending. Your kids are getting older and you're starting to see the light at the end of the tunnel - would you actually want to start over again with a newborn? If she's 30 and never married, her biological clock is probably ticking really loudly (unless she's one of those rare people who truly never wants to have kids.) Would you be willing, at this point in your life, to take on a new wife and new baby and all the financial obligation that entails?
I'm not saying anything is right or wrong, just saying that because of the different seasons of your life (more important than the actual age difference) you should think very carefully about what you are willing to take on.
(BTW, my boyfriend is 8 years younger than me, but we're much older so it's not a big deal.)
Also - you fell for her in a very emotion-charged setting - and being long distance keeps you from learning some of her flaws as early as you might otherwise. So while it's great to see her again, I'd keep thinking with your big head and pay attention to red flags if they come up.
Story: my best friend dated a guy for 6 months recently. Because he's cute, they have mutual friends, and share the same level of semi-fame in their field, she built him up in her head as being X,Y and Z and hurtled right past some big red flags (such as cheated on his last girlfriend, has no money and has accrued $15k of credit card debt without any plan or hope of paying it off, kind of hapless and helpless - definitely not a grownup even though he's 50.)
She didn't find out about the credit card debt until she had been dating for 3 mos - she kept secretly hoping, I think, that he had some money saved from his more successful earlier days - nope, not a cent. In fact, his financial situation is extremely precarious, and when his old beater car breaks down will lead to a house of cards falling down unless someone rescues him. And my friend is a responsible struggling single mom and widow who manages to keep her own head above water but the weight of rescuing someone like this guy would carry her financially down the tubes as well.
So I think it's fine to enjoy her company so long as you also ask yourself these tough questions, and find out a lot more about who she really is.
