I do not think the Church has ever taught this issue one way or another as doctrine. I found this article that refers to the ideas expressed by St. John Chrysostom.
While marriage—properly speaking—ends in this life, the noblest aspiration of the married couple is achieved in the next.
www.ncregister.com
My own idea is that relationships are so important, and eternal, because God Himself is a relationship, Father, Son, and Holy Spirit. I think the great mystery of Marriage, which is Christ and His Church, is not only diminished, but vanishes, if marriage ended in Heaven, though it is perhaps not right to call it marriage. It might well be something much more than marriage. I do not get too hung up on being “like the angels,” as we know even less about the angels than we do Heaven. Jesus did not clarify very much. I like to think of him as a parent who had bought the best Christmas present in the world, was excited about watching the child open it, but wanted to give nothing away, lest he spoil the surprise.
We do know that we won’t be angels, and will have at least one major difference in that we will still have our bodies, as opposed to being pure spiritual beings.
We do not know the answer to the OP question, that I know of. I have not seen anywhere the Church has defined it, and theologians are all over the map on this.
