I need help

So I have been with my boyfriend for about 2 years and I really love this boy and he loves me . But we have been arguing for a few days, and he is acting very distant like I have to hug and kiss him first . And before he left I said I love you but he replied and said prove it . every time I say I love you to him he says prove it 😭 what do I do how do I prove it to him that I love him 😭😭