I'm looking for a series where the girl or the boy doesn't fall in love so easily.
I don't a "OH I ONLY MET YOU FOR THE FIRST TIME BUT I LOVE YOU!"
I rather have a nice developed friendship before a relationship.
I prefer none of that ecchi, smut kind. I also rather not have yuri, yaoi, shounen-ai, shoujo-ai either.
Thank you~

only one recommendation from me.. Onani Master Kurosawa

PS: I like how your voldy chan dances

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there is a tag for this:
friends become lovers

on that list and pretty good:
Kimi ni Todoke
14-sai no Koi

apart from those on this list I recommend:
Iris Zero
Bonnouji
Dengeki Daisy
Orange Marmalade
Hiyokoi
Kagami no Kuni no Harisugawa
Bitter Virgin
Hana to Akuma
Densha Otoko is pretty down to earth

or just do a search on your own and exclude the "love at first sight" tag

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in need of romance?
uncommon, sad, sweet

Thanks. Normally I'd do that but I wanted suggestions from people themselves.

And yes, Voldemort does an excellent dance.

Read them all. >_<

Akagami no Shirayukihime is like that.

Hoshiiro no Okurimono is a short

Sorry I have nothing else right now.

I'm sure you've read this, but if not Lovely Complex fits perfectly. From the "Friends become lovers" tag I recommend these:
Max Lovely!
Love! Love! Love!
Eensy-Weensy Monster