You do more laundry of running clothes than anything else.
You seriously analyze which Gu flavor tastes the best, and make sure you stock up on them.
You don't think twice about having conversations about blisters, icing, foam rollers, Body Glide, port-a-potties, chafing, or calf stretches.
6 miles doesn't seem like that long anymore.
Your favorite pre-long run dinner is something with pasta.
You give strangers your opinion of the hand held water bottles in REI, without them asking.
Your latest shoe purchase are running shoes, and not cute sandals.
You just spent $17 on socks, but if you don't get blisters, then it's all worth it.