Whats wrong with him?

well my boyfriend asked me today. why do we always argue. and mnd you this whole weekend that just pasted went really good. we might have argued over sumthing little but majority was a very happy weekend. his birthday was monday so i filled his room with ballons and bout him a card and a little cake. i spent all my money on that. but still today he wants to ask y we always argue. why arent we ever happy, its like the times we are happy arent good enough for him. and when we watch movies and someone is doing something cute and romantic he says awww and says why cant we do stuff lke that. its soooo annoying. because n the beginning i didnt like romantic stuff. but as the relationship grew started to like it. its like he isnt satisfied in whatever we do. and he told me today its stucks that he cant be romantic with me even though i told him i like it now and plus its been two years get over it