Friendship Over Love ?!?!

If i was to turn back time to a relationship i have been in i get a sudden regret why? Because when things go apart its hard to retain friendship. so my question is friendship over love?!? What would you do if you fell for one of your Best's friends?! the most scariest thing right now is giving Your best friend a chance to love and risk loosing them as a friend, when things don't work out. Remember : there is always an end to love! 'Well that's what i believe personally' i could be Bias/bitter or i could be looking outside the box about this type of scenarios. How about If you fall for some one who might not be your close friend but is potentially capable of being a good friend would you still believe in friendship over love ?.
me and my circle of friends have become so close that falling for each other is sickening like falling for you siblings, not a pretty sight ! Ha. but one thing ave learned is if you know the person ain't gonna be your future husband or wife why risk getting together for it to fall apart and a high risk of you loosing what you had at the start of everything, An Healthy Friendship! Am i Speaking Truth or is my theory to strict for mankind now !?! Think About it '