thank you for addressing your question in the community.
As for your question how to get to Italy, please follow the link as this question was answered already by us:
On the question what is needed to get married in Italy please follow the below link:
However, for you the best wouldbe to get married with her in Pakistan in order to get a Visa for Italy.
In order to obtain the Italian citizenship it will take some time, but the different ways to get it is outlined under the following link: