Having her lose the relationship experiences that we all have as we grow older. Incidentally, our relationship didn't end because of the age difference.I think the thing I worry about is that when I was19, I thought I was ready for certain things, too.
I would be afraid of taking her away from her youth. If he's ready and understands how you feel and you openly express that, I don't see why it would be a problem.
So, if you’re 35 and dating a 37 year old, yeah, not a cougar.
But if you’re 35 and dating a 22 year old, ok, you might qualify.
As might someone who’s 55 and dating a 30 year old. And someone who was impossibly needy at 25 may be even moreso at 35, especially if she hasn’t had the relationships she’s wanted.
There is, however, some considerable perspective and confidence that comes with age, and the more evolved woman will exude it.