Funny seeing myself on a bus, but pretty cool!

Funny seeing myself on a bus, but pretty cool!
Funny to see myself on a bus, but pretty cool!

Do these two mean exactly the same?

Most of girls end up getting pregnant.
Most of girls end up being pregnant.
Most of girls end up pregnant.

Do all of these carry the same meaning?

It seems(something). Can I omit 'it' at the beginning of the sentences?

My comment will end up being deleted.
My comment will end up deleted.

How about these two?

How come that we use contracted versions in formal writing and avoid them in everyday speech? Why is that?