Matthew is the Angel King, the Lord of Heaven. He's been wanting a spouse ever since he made Adam an Eve. He longs for the contact. You're a first servant angel, made by Matthew. To him, you were perfect, and he wants you. So, as Matthew would do, he'd persistently want your love. Keeping you in his palace in Heaven, not letting you do a Guardian job or none for that matter, only keeping you by his side. All he wonders is why won't you love him.