Willingness is a synonym of Consent. Consent is a synonym of Agree. Agree is related to Nod. Nod is related to Agreement. 
Boyfriend is related to Date. Date is related to People. 
Willingness <--Synonym--> Consent <--Synonym--> Agree <--RelatedTo--> Nod <--RelatedTo--> Agreement 
Boyfriend <--RelatedTo--> Date <--RelatedTo--> People 