Over analyze this and August will be a long dry month for you pal. Get on the phone and ask this woman out again. Cross the "oh it just didn't work out between us" bridge when (and if) you come to it. In August if you two didn't hit it off then for craps sake be a man and deal with it. Between now and then you might have the ride of your life if you really like this woman. Why put it off.
Think of it this way: Today is yesterday's tomorrow. If you keep waiting for tomorrow you will never live your life. Life is today! Call her and get this thing going already.
