Well, we all surely have many categories of friends like "pen pals", "just friends", "good friends", "close friends", "best friends" so on and so forth. Sometime we even promote or demote(rarely) them within these categories. ;) Spending quality time with him/her brings them together and takes them another step ahead to become "close friends". One search in google with a keyword "friendship", will throw out numerous friendship quotes. Most of them are really touching and comply almost perfectly to what "friendship" means.
Never mix friendship and love. Both are unique and special in their own ways. They have their own place and if you happen to mix the both, its gonna cost you dearly. Think 100 times before you get into what i termed as "complex relationship". Atleast try to know if the other is interested or not before proceeding in that direction. Or just give it some time.
Love usually happens at first sight
Both are true and precious in their own ways
True love never fails;