Analyzing the card of the Seeker, The Star reversed, we can interpret it as a message of disappointment, lack of inspiration, too much dependence on emotions, mixed feelings, inner confusion or disappointment in love life. This means that you may be confused about your feelings for Marco and not entirely sure you want to marry him.
Analyzing the Adversary's card, Six of Pentacles reversed, we can interpret it as a message that indicates problems in the relationship between you and Marco. It could indicate a lack of sincerity from both of you, poor communication between you, or even a lack of mutual trust. This means that you may not be ready to get married due to problems in your relationship.
From the chosen cards we can conclude that the most probable answer to your question "Do you think Marco and I will get married?" both: no. In fact, the cards indicate that you may have doubts about your feelings for him and that there may also be some problems within your relationship. So it seems that the wedding is not that close.