But you've already said that that is so, by saying that ultimately, nothing has purpose. I'm not saying it's unreal, I'm saying you created your own sentiments of love and that you continue to foster them as long as you 'believe' you love.
You are saying that my belief in love is simply a illusion because even though it's real I have to believe it exists or else it wouldn't be there. This would also include everything I feel and see and even what I'm reading right now. If you are to reject A, and A exists in the same universe as B, then you are also rejecting everything.