Hi there! I'm sorry you have this situation with your friend finding out your url. :( FYI right now if you search your old url on google you still get the old url and "Hello, this is a blog made by two lazy fujoshi sisters lol" in the search result even though the actual blog is gone. If the fujoshi bit is the trouble, I would recommend changing the profile description on the old blog as well as deleting posts! I think there's also a way to make it not-google-able? Good luck!
Oh yeah about this! Yesterday, he asked me “What’s ur tumblr again?” I answered “I thought you know?” he said “No that tumblr doesn’t exist” and I’m like “See, told u that’s not my tumblr url! :P”. So it’s fine now thankfully :’)
(I think I might just be overreacting the other day when he found ‘notes’ on my mobile tumblr then he said “oldtumblrurl? Is that your tumblr?” then I practically ran from class to home that night.)
About the description.. well yeah I think I should change it. Thanks anon!