Whats your opinion??

so let me set up the scene. walking through wal-mart, i notice this girl in electronics alone looking at some movie's, I just glanced and kept walking went to the valentine candy aisle across the store, wanted some candy, while I was looking for this particular kind of candy that I like my dad, who was with me, saw the girl more or less wondering through the women's clothing probably 20 yards from us, I said were and walked to his vantage point. at that time she looked up and bam eye to eye contact from 60 feet not to bad right. well I didn't starr, just drifted my attention to something else. anyways found the candy and started back across the store to sporting goods were again I see the same girl down one of the aisles, just picked her up with the peripherals didn't look. went to get shampoo same girl now coming out of another aisle. now walking to check out I go to the first open register its 11:30 theres only two open but there she is again. this time as I'm putting my stuff on the counter she looks at me. Of course I smile but didn't really say anything. she makes her purchase and leaves right. not exactly walking out I see her standing at this dvd rental machine when i stop for a drink. she walks by, her car was two up from mine. she took off, I took off obviously having to go behind her as it is the way out. at the stop sign when i come up she is putting her car in and out of reverse basically the backup lights kept flashing on and off. thought nothing of it. both heading the same direction on a four lane the light turns red so i have to stop surprisingly right beside her. we take off she stays beside me for awhile then speds ahead and I change lanes instantly she changes lanes and a few hundred feet more turns into a store. I keep going glancing in the rear view I see her pull to the front of the store stop and then turn around and get back on the road behind me but like a half mile back. I turned off to the left at taco bell and I believe she kept going. but then I swear, she turned around after seeing my car and drove slowly by. so if you made it to the end of my story my question is did I miss out on a possible oppurtunity with a very attractive women or did she think, that I was stalking her??? And what should I have done differently???