I am assuming that you want to add a number of Resume_Subscriptions__c equal to the quantity field on the OpportunityLineItem object.  Here is the code for that:

trigger trg_new_ResumeSubscription on Opportunity (after update)
{
   List<Opportunity> closedWonOpps=new List<Opportunity>();

   for (Opportunity opp : trigger.new)
   {
       Opportunity oldOpp=trigger.oldMap.get(opp.id);
       if ( (opp.StageName=='Closed Won') &&
            (oldOpp.StageName!='Closed Won') )
       {
          closedWonOpps.add(opp);
       }
   }
    
   if (!closedWonOpps.isEmpty())
   {
	List<OpportunityLineItem> olis = [SELECT ID, OpportunityId, Subscription_Term1__c, UnitPrice, 
        Product_Name__c,Closed_Won_Date__c, Daily_View_Limit1__c, Views_Purchased1__c, Quantity FROM OpportunityLineItem WHERE Product_Family__c = 'Resume Search' and
        OpportunityId in :closedWonOpps];

	List<Resume_Subscriptions__c> rsToInsert=new List<Resume_Subscriptions__c>();
   for (OpportunityLineItem oli : olis)
   {
	For (integer i = 0; i < oli.Quantity; i++){
   		Resume_Subscriptions__c newRS= new Resume_Subscriptions__c();
        	newRS.Views_Purchased3__c = oli.Views_Purchased1__c;
        	newRS.Subscription_Term3__c = oli.Subscription_Term1__c;
        	newRS.Price__c = oli.UnitPrice;
        	newRS.Product_Name__c = oli.Product_Name__c ;
        	newRS.Opportunity__c = oli.Opportunityid;
        	newRS.Purchase_Date2__c = oli.Closed_Won_Date__c;
        	newRS.Daily_View_Limit3__c = oli.Daily_View_Limit1__c;
        	rsToInsert.add(newRS);
        }
    }

    insert rsToInsert;
   }
}

 If I have not made the correct assumptions, let me know what you really want and I will try to help.

Hope this helps.