And I didn't mean I love you as in you're my best friend and ●●I've known you since forever type of way●●. I love you as in I want to be with you and whatever that ... https://books.google.co.jp/books?id=QZRoDwAAQBAJ&pg=PT155&lpg=PT155&dq=%22known+you+since+forever+type+of%22&source=bl&ots=uePJodbdv5&sig= ACfU3U15fQOutOFTxEEC8ZJt_nB6HLWMWA&hl=en&sa=X&ved=2ahUKEwjWkY7-rIznAhWTHHAKHXwZCfAQ6AEwAHoECAEQAQ#v=onepage&q=%22known%20you%20since%20forever%20type%20of%22&f=false
恋愛小説とかそこらへんの軽薄な娯楽小説には、"I've known you since forever." と いうセリフが目白押しであり、いくらでも見つかるな。