I've seen some people say that its best to focus on God and not let yourself worry about finding a mate, or that one should learn to be happy being single. I've always believed that there is a reason for how our minds and our bodies work as human beings because our creator made it that way. For example we get hungry when our body needs food, we get tired when our bodies need rest, we become worried when there is something we need to fix, we become happy when we feel loved or appreciated. By the same token, we feel sad and desperate when we are lonely. This is not an accident. It is evidence that we were designed by our creator to want to go out and find ourselves a mate. That is what this longing called loneliness is. One cannot fully experience human love by focusing on Jesus or by having a friend who is not their partner in a relationship. Only with a loving partner can one fully experience human love.
[It is] not good that the man should be alone; I will make him an help meet for him.
Genesis 2:18 (KJV)
The other reason I believe God wanted us to actively look for a mate is because of the simple fact that if we all sat around waiting for that perfect mate then how and when can the next generation be born and raised?
"As for you, be fruitful and multiply; Populate the earth abundantly and multiply in it."
Genesis 9:7 (NASB)
It is fine to focus on Jesus' love to get you through your loneliness, I've done it myself on many occasions, but we shouldn't continually try to ignore the tugging at our hearts to go and find someone who might become our partner in every sense of the word, so that we can experience human love as God wants us to experience it and so we can bring forth the next generation of young christians and not continue to be outnumbered by the worldly who have no qualms about dating and marrying.
"Ask and it will be given to you; seek and you will find; knock and the door will be opened to you."
Matthew 7:7 (NIV)