A variation of "smother", obviously, to describe someone with an inclination to smother other people.
"You're just too needy and smothersome."
Thoughts? Corrections? Suggestions?
Edit: Apologies and clarification. I did find a Google search result that states that this word is an adjective which describes something that is easily smothered. But to me, this word sounds akin to "bothersome": causing bother, troublesome. To me, "smothersome" wouldn't describe something that is easily smothered, instead it would describe something that does the smothering...