EWTN = Eternal Word Television Network (catholic TV). There is also a website
www.ewtn.com
What people are saying is that under ordinary circumstances, a couple needs to have physical relations (sex) to get married. I’m gathering that there are some rare exceptions to this, but they are indeed rare, and they are exceptions. A dispensation would be permission given to do what otherwise wouldn’t be allowed. I believe this permission would need to come from your bishop.
Consumating the marriage is having physical relations, NOT having children.
It is not a requirement of marriage that you have children. It is, however, a requirement that you be open to having children. After all, the primary purpose of marriage is to have children (well that and help your spouse get to heaven), and it is one of the promises that is made in a Catholic wedding. If you have relations and are open to children, but are not ever blessed with children, then that is ok. But to enter into marriage, knowing that you will not be open to children would require you to lie at your wedding, and would be grounds for considering the marriage null (if it ever came up).
I imagine it must be a difficult dilemma to be in love with someone, yet not feel called to the married life. But love is not a feeling and it can not be the only reason for marrying a person. Unless this is a really unique situation (talk to your priest if you really think it is), it just doesn’t make sense to get married if you are not able to fulfil the responsibilities of marriage. Lying at your wedding and living a life that contradicts the meaning of marriage will not help you or your spouse get to heaven. So the most loving thing to do for a person in this case would be not to marry them, and support their holiness in other ways, pursuing the path your life is really meant to take.