But then when u said something bout gals n boys can be best frends, here something u should b careful of. It happen me though. I have close female frend around, where we share anything, like sex, porno, period and so on. There's no gap for shyness or watsoever. But then when i develop feeling for one of them who r still single, n we bcame couple, here comes interesting story. Some of my frend starting to avoid calling me to yum cha. I dunno wat the real reason, but there's totally a gap being developed. Having some "special" reason for the frendship should be kicked out as the reason for the gap, as they too have their own gf n bf. For them, it's really weird for frend to bcome couple. Mayb they think one day i may also fall for them? But then i tought shouldn't us bcome frend to knoe each other better b4 moving further into relationship ? If frend cannot bcome lover, means there's only love at 1st sight ? Am i wrong ? But if so, how would u probably knoe his characteristic or know him or her well ?

So, conclusion guys n gals can b best frend, but must b very careful not to developed unwanted feeling. If not, mayb u will b like me? 
Juz my 3 cent. Lolz