1. 'getting into' would mean doing. Getting on its own is just the straighforward meaning of to get - what is this guy like. Are you getting a nice man or a clever man or an ugly man etc?
2. Stops you thinking about him all the time. Yes I agree about the 'of' being redundant.
I have this feeling of uneasiness about using hyphens to form a noun? Is it done often? Can you refer me to a source where I can learn how to make the nouns like that properly? Why not just write out like this?
He is a soon-to-be college student. (I think this is OK too.)