pace running at park for 10K

When I arrived at Sento, I've met Rie. She was almost out to park. However she came back inside, so we went to park together. But as soon as arrived in the park, she went to hill, so shame... we couldn't run together.
So, I've run alone for 10K even there were many companies. But I have some reason for long distance.
As my bad split, does not work my pace running...

today's efforts:
mileage: 10K (5laps×2Km)
time: 47'10
split:
9'19 /2k
9'15 /2k
8'44 /2k
9'57 /2k(easy run)
9'53 /2k(easy run)
this week's mileage: 18Km