I am training for my first 1/2 marathon on Mother's Day. I am following Hal Higdon's novie training guide for it. My remaining long runs are as follows: 7, 8, 6.2 (10k), 9, 10 and 1/2 marathon. My friend who is running it with me is concerned that I might not be building enough high mileage beforehand. (I have never run more than a 10k distance before). I run an additional 2-3x per week and also a cross training day (so working out 5-6 days per week, if that makes sense). The mileage varies, but this week, for instance, I have run 9 miles throughout the week. Can you suggest a plan for my remaining long runs? Thanks.