I think everyone is "in love" with their best friend, its a different kind of love though, the kind you have for your dog, mom, or and old class friend.
And if you begin to develop romantic feelings for your best friend, then they are no longer your best friend....Now don't jump to conclusions...THINK ABOUT IT...
You are beginning to develop feelings for your best friend...do you tell them? NO! You wait, right? You begin to become more aware of yourself in front of them...you no longer complain to them because you don't want to sound like a whiney turd. You no longer tell them things that make you seem like a complete loser...right?
If anyone disagrees, they are totally lying!!!! LOL. Once you start feeling romantically toward your best friend, they longer remain your best friend because you begin distancing yourself. You dress better when meeting them... wearing jeans rather than your sweats, you put on make-up, wear your hair down instead of in a bun, and you wear your heels rather than your beat up sneakers...
See what I mean? You hope and want them to feel the same way you do before you completely put yourself out there, hence you "probe" into their feelings by asking questions like "We're good together right?..." or "Can you imagine us in the future..." leaving open-ended answers...hoping not to hear a "buddy" or "pal" at the end of their statement...
Best friends have their place and significant others have their place, its best not to mix the two...thats my 2 cents...