What do I do to resolve this... ?

The only person who can answer this is your boyfriend, but it could be his way of saying he wants to end it, sometimes males are wimps like that and would rather hint off, and let you finish with them instead of the aggro, if you do care that much, i would go round but dont beg or nothing just say you want an answer, and if she says its over or something, just be strong and walk away, its his loss :)