James Bond once says, "Because once you've tasted it, it's all you want to drink". Apparently it holds true not only for drinks, but for relationship as well. Some people I know never stay single for more than six months (some even less) once they tasted the bittersweet flavor of relationship. Some of my friends even aggressively look for "The One" (which I prefer to call "The Next One" instead). Nothing is wrong with wanting a relationship. Every girl desires it. I do as well. Even Eve got her Adam. So it is certainly OK to have a relationship.
The problem lies behind the meaning of the relationship itself. Why do you want this relationship you are currently pursuing? What do you expect from this relationship, from the other partner? I often find different reasons for pursuing a relationship, including social status (what is it with being single = unattractive), companionship (can't cope with loneliness), desires, fun, age (in my culture, people are getting annoying with questions regarding your future spouse when you reach a certain age) , etc.
I am no expert in relationship since mine failed (and I believe it was
because I was not ready and felt overwhelmed with it. However, I also believe that the breakup I had was a breakthrough for both of us. He is now in a much better state, and I learned my mistakes.)
I now believe that the main purpose is to glorify God, to become more like Him. The Bible has given clear instructions on godly characteristics (1 Timothy 5:8, 1 Peter 3:7, etc). We need to be personally ready with these godly qualities before we seek a godly person. We also need to remember that the romantic feeling should be there (if not, do you really think you want to be with the same person for lifetime? I don't), but it should not lead our thoughts. Instead, we need to let God in our relationship. One thing I found is that if you pour out your love to your partner out of desires only, soon you'll get tired of it. You need to pour out love to your partner based on God's everlasting love.