When we unite ourselves to Christ, are we elevated to heaven?

My question is directed to the Catholic perspective. While meditating on the Ascension of Our Lord, this thought came to my mind: There's only One Christ, which ascended into Heaven. If so, does that mean that when we unite ourselves to Him, be in our sorrows uniting to His, or our joys or some other aspect of the human life, does that mean this which we unite to Him (or what is His) is elevated to Heaven also, respecting, of course, the degree of perfection of this union? Furthermore, if that is the case, is this at least one sense of Christ's mediation between us and God? I'm asking this because I'm new to the faith, a cathecumen indeed.