What the hell? Nobody kisses in Marimite. I'd say it's going pretty fast, it only seems slow because the chapters come out so slow. The whole OH GOD I CAN'T TELL HER I KISSED HER IN HER SLEEP thing only lasted one chapter, I could see most romance manga stretching it for much longer.
It might be taking a bit long to get some hope of reciprocity though, it's been completely one-sided so far. But I suppose the guy is being introduced to create an opportunity for sudden jealousy and whatnot.