From my experience, which, I must add, compared to others who have already posted in this thread, could probably be little, I would say that the best thing to do in these situations is to live a good Christian life, while you’re waiting for the right person to come. I’d say that you must not put an excessive worry in that particular matter, because if you do, you’ll probably get anxious, and thus unavaliable to many of your other obligations as a Christian, and as a Roman Catholic, more specifically.
As someone already said, being a single, even if it’s just temporarily, until you find the person who is right for you to marry with (i.e., if your vocation is marriage and raising a Christian family), is a blessing. It is, in fact. It is necessary to recognize that the Lord puts you in that particular situation for a wide range of reasons, which you begin to recognize, if you trully live (or try to, as we all do!) a Christian life, through that period of time. I found myself much more avaliable to apostolate (which is a basic duty of any Christian, since the moment you are baptized) and other acts of piety and charity (undeniable obligations of a Christian life) towards your brothers and sisters, since my last relationship ended. It is a fact! You have more time, more disponibility, you have no obligations other than to your family, and you also have less worries, that are common when you have a relationship.
So, what I am trying to say is that in this situation, you might recognize that God is calling you to work a little bit for His Kingdom, for His people. Do not reject or despise this offer, because, I can guarantee you, you will be greatly rewarded, in the end. More important than this; do not despair. The Lord wants in every soul, an apostle. Confident apostles. Faithful apostles. Optimistic apostles! A person who is faithful must necessarily be an optimistic, confident person. Not confident or optimistic about him/herself, but about God, about the constant presence of God by him/her side, and finally, about God wanting the best for him/herself. So, in my humble opinion, I think that this is an excellent oportunity to improve your confidence in the Lord, throught prayer (the Rosary helps a lot, and through it, pray to Our Lady, so that Mary intercedes for you towards her Son), and to improve in your apostolate and in the cumpliment of your obligations as a Christian and a Catholic.
And wait for God’s timming, be a good observer and be alert and ready for the Graces that the Lord will bath you in, because, like I told you, when the reward comes, it will be a great one, if you enjoy this oportunity to be closer to God and to serve Him in His many works on this Earth.