Personally, I feel if the salespeople are on commission, and you monopolize their time with a ton of questions and advice, without any intention of buying? Yeah, probably a little douchy!
If you, are buying anything at all, and you're friend is just having them go and bring out a few styles, sizes of boots,..? Or if the salespeople are not working off commission? I wouldn't worry about it too much.
You're only Young Once,.. but you can be Immature FOREVER!