Your analysis of this show is quite confusing. In S1 and 2 you are quite happy with understanding what is anviled in and shoved in our face, but seem incapable of getting the undertones of what is going on eg. the Doctor as a father figure for example. But in S3 the anvils of Marthas love for the Doctor, you choose to ignore it and interpret it as something different.

I love Martha, and I can't say I wasn't fond of the unrequited storyline, in fact at times it thoroughly pissed me off. However, you can't deny it wasn't there.

What I really fail to understand is a lot of peoples inability to grasp the fact that you can fall in love so easily. Trust me, it happens. Usually it sucks, just like it did with Martha. But it does happen. Maybe you think love is easy and rosy, but it crops up at the really most unfortunate times.